Form 485BPOS PUTNAM VARIABLE TRUST

May 20, 2016 9:19 AM EDT

As filed with the Securities and Exchange Commission on   
May 20, 2016   
 
Registration No. 33-17486 
811-05346 
 
SECURITIES AND EXCHANGE COMMISSION   
WASHINGTON, D.C. 20549   
 
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FORM N-1A   
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REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933  /X/ 
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  ---- 
Pre-Effective Amendment No.  / / 
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Post-Effective Amendment No. 56  /X/ 
and  ---- 
  ---- 
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY  /X/ 
ACT OF 1940  ---- 
  ---- 
Amendment No. 57  /X/ 
(Check appropriate box or boxes)  ---- 
 
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PUTNAM VARIABLE TRUST   
(Exact name of registrant as specified in charter)   
 
One Post Office Square, Boston, Massachusetts 02109   
(Address of principal executive offices)   
 
Registrant's Telephone Number, including Area Code   
(617) 292-1000   
  It is proposed that this filing will become effective 
  (check appropriate box) 
 
----   
/ /  immediately upon filing pursuant to paragraph (b) 
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/ X /  on April 30, 2016 pursuant to paragraph (b) 
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/ /  60 days after filing pursuant to paragraph (a)(1) 
----   
----   
/ /  on (date) pursuant to paragraph (a)(1) 
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/ /  75 days after filing pursuant to paragraph (a)(2) 
----   
----   
/ /  on (date) pursuant to paragraph (a)(2) of Rule 485. 
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If appropriate, check the following box: 
----   
/ /  this post-effective amendment designates a new 
----  effective date for a previously filed post-effective amendment.   
 
 
 
  ROBERT T. BURNS, Vice President 
  PUTNAM VARIABLE TRUST 
  One Post Office Square 
  Boston, Massachusetts 02109 
  (Name and address of agent for service) 
  --------------- 
  Copy to: 
  BRYAN CHEGWIDDEN, Esquire 
  ROPES & GRAY LLP 
  1211 Avenue of the Americas 
  New York, New York 10036 

 


SIGNATURES 

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston, and The Commonwealth of Massachusetts, on the 20tht day of May, 2016.

  Putnam Variable Trust 
By: /s/ Jonathan S. Horwitz, 
 
Executive Vice President, Principal Executive Officer 
and Compliance Liaison 

 

Pursuant to the requirements of the Securities Act of 1933, this Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

Signature  Title 
Jameson A. Baxter *  Chair, Board of Trustees 
 
Robert L. Reynolds*  President and Trustee 
 
Jonathan S. Horwitz*  Executive Vice President, Principal Executive Officer 
  and Compliance Liaison 
 
Steven D. Krichmar*  Vice President and Principal Financial Officer 
 
Janet C. Smith*  Vice President, Principal Accounting Officer and 
  Assistant Treasurer 
 
Liaquat Ahamed*  Trustee 
 
Ravi Akhoury*  Trustee 
 
Barbara M. Baumann*  Trustee 
 
Robert J. Darretta*  Trustee 


Katinka Domotorffy*  Trustee 
 
John A. Hill*  Trustee 
 
Paul L. Joskow*  Trustee 
 
Kenneth R. Leibler*  Trustee 
 
Robert E. Patterson*  Trustee 
 
George Putnam, III*  Trustee 
 
W. Thomas Stephens*  Trustee 

 

By: /s/ Jonathan S. Horwitz, 
as Attorney-in-Fact 
May 20, 2016 
 
* Signed pursuant to power of attorney filed 
in Post- Effective Amendment No. 48 to the 
Registrant’s Registration Statement on April 
26, 2013 

 

v3.4.0.3
Putnam VT Absolute Return 500 Fund
Goal
Putnam VT Absolute Return 500 Fund seeks to earn a positive total return that exceeds the return on U.S. Treasury bills by 500 basis points (or 5.00%) on an annualized basis over a reasonable period of time (generally at least three years or more) regardless of market conditions.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Absolute Return 500 Fund Fund
Class IA
Class IB
Management fees 0.72% 0.72%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.62% 0.62%
Acquired fund fees and expenses 0.02% 0.02%
Total annual fund operating expenses 1.36% 1.61%
Expense reimbursement [1] (0.44%) (0.44%)
Total annual fund operating expenses after expenses reimbursement 0.92% 1.17%
[1] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through 4/30/17. This obligation may be modified or discontinued only with approval of the fund's Board of Trustees.
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Expense Example - Putnam VT Absolute Return 500 Fund Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 94 387 703 1,597
Class IB 119 465 835 1,874
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 520%.
Investments
The fund is designed to pursue a consistent absolute return by combining two independent investment strategies — a beta strategy, which provides broad exposure to investment markets, and an alpha strategy, which seeks returns from active trading. The beta strategy seeks to balance risk and to provide positive total return by investing, without limit, in many different asset classes, including U.S., international, and emerging markets equity securities (growth or value stocks or both) and fixed-income securities; mortgage- and asset-backed securities; below-investment-grade securities (sometimes referred to as “junk bonds”); inflation-protected securities; commodities; and real estate investment trusts (REITs). The alpha strategy involves the potential use of active trading strategies designed to provide additional total return through active security selection, tactical asset allocation, currency transactions and options transactions. In pursuing a consistent absolute return, the fund’s strategies are also generally intended to produce lower volatility over a reasonable period of time than has been historically associated with traditional asset classes that have earned similar levels of return over long historical periods. These traditional asset classes might include, for example, balanced portfolios with significant exposure to both stocks and bonds.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks when deciding whether to buy or sell fixed-income investments. We may also take into account general market conditions when making investment decisions. We typically use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, to a significant extent for hedging purposes and to increase the fund’s exposure to the asset classes and strategies mentioned above, which may create investment leverage.

Risks
It is important to understand that you can lose money by investing in the fund.

Our allocation of assets among asset classes may hurt performance. The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Default risk is generally higher for non-qualified mortgages. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which may be considered speculative. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation) and may be or become illiquid. Our alpha strategy may lose money or not earn a return sufficient to cover associated trading and other costs. Our use of leverage obtained through derivatives increases these risks by increasing investment exposure. Derivatives also involve the risk, in the case of many over-the-counter instruments, of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. The fund’s efforts to produce lower volatility returns may not be successful and may make it more difficult at times for the fund to achieve its targeted return. In addition, under certain market conditions, the fund may accept greater volatility than would typically be the case, in order to seek its targeted return. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Investor profile

The fund is designed for investors seeking positive total return in excess of the return on U.S. Treasury bills by a targeted amount (500 basis points) on an annualized basis over a reasonable period of time regardless of market conditions. Because the fund seeks performance over a reasonable period of time, investors should be willing to wait out short-term market fluctuations and should generally have an investment horizon of at least three years or more. The fund may be suitable for you if you are considering a balanced fund, or a fund that can manage allocations and risk across global asset classes.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -1.26%

Best calendar quarter
Q1 12 4.57%

Worst calendar quarter
Q2 13 -1.55%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Absolute Return 500 Fund Fund
1 Year
Since inception
Inception Date
Class IA (0.22%) 1.92% May 02, 2011
Class IB (0.44%) 1.65% May 02, 2011
BofA Merrill Lynch U.S.Treasury Bill Index (no deduction for fees, expenses or taxes) 0.09% 0.09% May 02, 2011
BofA Merrill Lynch U.S. Treasury Bill Index plus 500 basis points 5.09% 5.09% May 02, 2011
S&P 500 Index (no deduction for fees or expenses) 1.38% 11.42% May 02, 2011
Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses) 0.55% 3.11% May 02, 2011
The Barclays U.S. Aggregate Bond Index and the S&P 500 Index are broad measures of market performance. Securities in the fund do not match those in the indexes and the performance of the fund will differ.
v3.4.0.3
Putnam VT American Government Income Fund
Goal
Putnam VT American Government Income Fund seeks high current income
with preservation of capital as its secondary objective.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT American Government Income Fund
Class IA
Class IB
Management fees 0.39% 0.39%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.23% 0.23%
Total annual fund operating expenses 0.62% 0.87%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT American Government Income Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 63 199 346 774
Class IB 89 278 482 1,073
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 905%.
Investments
We invest mainly in bonds and securitized debt instruments (such as mortgage-backed investments) that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bonds and Ginnie Mae mortgage-backed bonds) or by only the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds), and that have short- to long-term maturities. Under normal circumstances, we invest at least 80% of the fund’s net assets in U.S. government securities. We may invest up to 20% of the fund’s net assets in mortgage-backed and other asset-backed securities of private (non-governmental) issuers and securities issued by money market funds, in each case rated AAA or its equivalent at the time of purchase by a nationally recognized securities rating agency or, if unrated, that we determine to be of comparable quality. This policy may be changed only after 60 days’ notice to shareholders.

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options, and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Credit risk is generally greater for debt not backed by the full faith and credit of the U.S. government, and interest rate risk is generally greater for longer-term bonds. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 0.36%

Best calendar quarter
Q1 09 5.84%

Worst calendar quarter
Q3 08 -2.70%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT American Government Income Fund
1 Year
5 Years
10 Years
Class IA (0.33%) 2.60% 5.09%
Class IB (0.65%) 2.33% 4.82%
Barclays Government Bond Index (no deduction for fees or expenses) 0.86% 2.77% 4.10%
v3.4.0.3
Putnam VT Capital Opportunities Fund
Goal
Putnam VT Capital Opportunities Fund seeks long-term growth of capital.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Capital Opportunities Fund
Class IA
Class IB
Management fees 0.62% 0.62%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.27% 0.27%
Total annual fund operating expenses 0.89% 1.14%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Capital Opportunities Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 91 284 493 1,096
Class IB 116 362 628 1,386
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 21%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of small and midsize U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -0.46%

Best calendar quarter
Q2 09 24.01%

Worst calendar quarter
Q4 08 -24.85%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Capital Opportunities Fund
1 Year
5 Years
10 Years
Class IA (7.37%) 7.59% 6.41%
Class IB (7.61%) 7.33% 6.14%
Russell 2000 Index (no deduction for fees or expenses) (4.41%) 9.19% 6.80%
As of April 1, 2016, the Russell 2000 Index (an unmanaged index of 2,000 small companies in the Russell 3000 Index) replaced the Russell 2500 Index (an unmanaged index of 2,500 small and midsize companies in the Russell 3000 Index) as the benchmark for this fund because, in Putnam Investment Management, LLC’s opinion, the securities tracked by this index more accurately reflect the types of securities that generally will be held by the fund. The average annual total returns of the Russell 2500 Index for the one-, five-, and ten-year periods ended on December 31, 2015 were –2.90%, 10.32%, and 7.56%, respectively.
v3.4.0.3
Putnam VT Diversified Income Fund
Goal
Putnam VT Diversified Income Fund seeks as high a level of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Diversified Income Fund
Class IA
Class IB
Management fees 0.54% 0.54%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.21% 0.21%
Total annual fund operating expenses 0.75% 1.00%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Diversified Income Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 77 240 417 930
Class IB 102 318 552 1,225
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 876%.
Investments
We invest mainly in bonds that are securitized debt instruments (such as mortgage-backed investments) and other obligations of companies and governments worldwide, are either investment-grade or below-investment-grade in quality (sometimes referred to as “junk bonds”) and have intermediate- to long-term maturities (three years or longer).

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options, certain foreign currency transactions and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments). Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.


The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -4.01%

Best calendar quarter
Q2 09 18.40%

Worst calendar quarter
Q4 08 -21.54%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Diversified Income Fund
1 Year
5 Years
10 Years
Class IA (2.32%) 2.88% 4.45%
Class IB (2.34%) 2.65% 4.34%
Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses) 0.55% 3.25% 4.51%
Citigroup Non-U.S. World Government Bond Index (no deduction for fees or expenses) (5.54%) (1.30%) 3.05%
JPMorgan Developed High Yield Index (no deduction for fees or expenses) (4.53%) 5.45% 7.14%
v3.4.0.3
Putnam VT Equity Income Fund
Goal
Putnam VT Equity Income Fund seeks capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Equity Income Fund
Class IA
Class IB
Management fees 0.47% 0.47%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.11% 0.11%
Total annual fund operating expenses 0.58% 0.83%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Equity Income Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 59 186 324 726
Class IB 85 265 460 1,025
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 22%.
Investments
We invest mainly in common stocks of midsize and large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Under normal circumstances, we invest at least 80% of the fund’s net assets in common stocks and other equity investments that offer the potential for current income. This policy may be changed only after 60 days’ notice to shareholders. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 0.41%

Best calendar quarter
Q2 09 18.31%

Worst calendar quarter
Q4 08 -18.93%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Equity Income Fund
1 Year
5 Years
10 Years
Class IA (2.79%) 12.22% 8.13%
Class IB (3.04%) 11.95% 7.87%
Russell 1000 Value Index (no deduction for fees or expenses) (3.83%) 11.27% 6.16%
v3.4.0.3
Putnam VT George Putnam Balanced Fund
Goal
Putnam VT George Putnam Balanced Fund seeks to provide a balanced investment composed of a well-diversified portfolio of stocks and bonds which produce both capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT George Putnam Balanced Fund
Class IA
Class IB
Management fees 0.52% 0.52%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.20% 0.20%
Total annual fund operating expenses 0.72% 0.97%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT George Putnam Balanced Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 74 230 401 894
Class IB 99 309 536 1,190
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 223%.
Investments
We invest mainly in a combination of bonds and common stocks (growth or value stocks or both) of large U.S. companies, with a greater focus on common stocks. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We buy bonds of governments and private companies that are mostly investment-grade in quality with intermediate- to long-term maturities (three years or longer). We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”) which may be considered speculative.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 0.51%

Best calendar quarter
Q2 09 13.04%

Worst calendar quarter
Q4 08 -27.53%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT George Putnam Balanced Fund
1 Year
5 Years
10 Years
Class IA (0.96%) 8.59% 3.63%
Class IB (1.23%) 8.35% 3.37%
S&P 500 Index (no deduction for fees or expenses) 1.38% 12.57% 7.31%
Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses) 0.55% 3.25% 4.51%
George Putnam Blended Index (no deduction for fees or expenses) 1.40% 9.12% 6.81%
The fund's performance is compared to the Barclays U.S. Aggregate Bond Index, an unmanaged index of U.S. investment-grade fixed income securities. The fund's performance is also compared to the S&P 500 Index, an unmanaged index of large U. S. company stocks. In addition, the fund’s performance is compared to the George Putnam Blended Index, an unmanaged index administered by Putnam Management, 60% of which is the S&P 500 Index and 40% of which is the Barclays U.S. Aggregate Bond Index.
v3.4.0.3
Putnam VT Global Asset Allocation Fund
Goal
Putnam VT Global Asset Allocation Fund seeks long-term return consistent with preservation of capital.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Global Asset Allocation Fund
Class IA
Class IB
Management fees 0.59% 0.59%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.28% 0.28%
Total annual fund operating expenses 0.87% 1.12%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Global Asset Allocation Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 89 278 482 1,073
Class IB 114 356 617 1,363
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 339%.
Investments
We invest a majority of the fund’s assets in a diversified portfolio of equity securities (growth or value stocks or both) of both U.S. and foreign companies of any size. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We also invest in a diversified portfolio of fixed-income investments, including both U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments.

We may also select other investments that do not fall within these asset classes. We may also use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

Our allocation of assets among asset classes may hurt performance. The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”), which may be considered speculative. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-and asset-backed investments, in other investments with less attractive terms and yields.

The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -0.32%

Best calendar quarter
Q2 09 16.12%

Worst calendar quarter
Q4 08 -19.54%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Global Asset Allocation Fund
1 Year
5 Years
10 Years
Class IA 0.42% 8.57% 6.23%
Class IB 0.17% 8.29% 5.99%
Russell 3000 Index (no deduction for fees or expenses) 0.48% 12.18% 7.35%
Putnam Balanced Blended Benchmark (no deduction for fees or expenses) 0.35% 8.00% 6.25%
Putnam Balanced Blended Benchmark is an unmanaged index administered by Putnam Investment Management, LLC, 50% of which is the Russell 3000 Index, 35% of which is the Barclays U.S. Aggregate Bond Index, 10% of which is the MSCI/EAFE Index (ND) and 5% of which is the JPMorgan Developed High Yield Index.
v3.4.0.3
Putnam VT Global Equity Fund
Goal
Putnam VT Global Equity Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Global Equity Fund
Class IA
Class IB
Management fees 0.69% 0.69%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.17% 0.17%
Total annual fund operating expenses 0.86% 1.11%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Global Equity Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 88 274 477 1,061
Class IB 113 353 612 1,352
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 56%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments. This policy may be changed only after 60 days’ notice to shareholders. We may also consider other factors that we believe will cause the stock price to rise.

We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -3.76%

Best calendar quarter
Q2 09 22.27%

Worst calendar quarter
Q4 08 -23.60%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Global Equity Fund
1 Year
5 Years
10 Years
Class IA (1.49%) 8.77% 4.91%
Class IB (1.71%) 8.50% 4.65%
MSCI World Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends) (0.87%) 7.59% 4.98%
v3.4.0.3
Putnam VT Global Health Care Fund
Goal
Putnam VT Global Health Care Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Global Health Care Fund
Class IA
Class IB
Management fees 0.62% 0.62%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.13% 0.13%
Total annual fund operating expenses 0.75% 1.00%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Global Health Care Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 77 240 417 930
Class IB 102 318 552 1,225
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 16%.
Investments
For this non-diversified fund concentrating in the health care industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in securities of companies in the health care industries. This policy may be changed only after 60 days’ notice to shareholders. Potential investments include companies that manufacture health care supplies or provide health care-related services, and companies in the research, development, production and marketing of pharmaceuticals and biotechnology products. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The health care industries may be affected by technological obsolescence, changes in regulatory approval policies for drugs, medical devices or procedures and changes in governmental and private payment systems. Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -10.87%

Best calendar quarter
Q1 13 13.10%

Worst calendar quarter
Q3 11 -17.93%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Global Health Care Fund
1 Year
5 Years
10 Years
Class IA 8.06% 18.98% 10.20%
Class IB 7.79% 18.68% 9.93%
MSCI World Health Care Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends) 6.60% 17.15% 9.25%
v3.4.0.3
Putnam VT Global Utilities Fund
Goal
Putnam VT Global Utilities Fund seeks capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Global Utilities Fund
Class IA
Class IB
Management fees 0.62% 0.62%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.19% 0.19%
Total annual fund operating expenses 0.81% 1.06%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Global Utilities Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 83 259 450 1,002
Class IB 108 337 585 1,294
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 17%.
Investments
For this non-diversified fund concentrating in the utilities industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in securities of companies worldwide in the utilities industries. This policy may be changed only after 60 days’ notice to shareholders. Potential investments include electric, gas or water utilities and companies that operate as independent producers and/or distributors of power. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The utilities industries may be affected by increases in fuel costs, technological obsolescence, changes in regulatory policies and deregulation. Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 9.40%

Best calendar quarter
Q2 09 14.09%

Worst calendar quarter
Q3 08 -19.64%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Global Utilities Fund
1 Year
5 Years
10 Years
Class IA (9.65%) 3.40% 3.33%
Class IB (9.91%) 3.14% 3.06%
MSCI World Utilities Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends) (6.61%) 3.61% 3.88%
v3.4.0.3
Putnam VT Government Money Market Fund
Goal
Putnam VT Government Money Market Fund seeks as high a rate of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital and maintenance of liquidity.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Government Money Market Fund
Class IA
Class IB
Management fees 0.28% 0.28%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.15% 0.15%
Total annual fund operating expenses 0.43% 0.68%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Government Money Market Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 44 138 241 542
Class IB 69 218 379 847
Investments
We invest at least 99.5 percent of the fund’s total assets in cash, U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities or cash. We invest mainly in debt securities that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bills) or by the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds). The U.S. government securities in which we invest may also include variable and floating rate instruments and when-issued and delayed delivery securities (i.e., payment or delivery of the securities occurs at a future date for a predetermined price). Under normal circumstances, we invest at least 80% of the fund’s net assets in U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities. This policy may be changed only after 60 days’ notice to shareholders. The securities purchased by the fund are subject to quality, maturity, diversification and other requirements pursuant to rules promulgated by the Securities and Exchange Commission. We may consider, among other factors, credit and interest rate risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risks
You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, there is no guarantee that the fund will be able to do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The fund’s sponsor has no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time.

The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund’s investments). Although the fund only buys high quality investments, investments backed by a letter of credit carry the risk that the provider of the letter of credit will not be able to fulfill its obligations to the issuer. Changes in the financial condition of an issuer or counterparty, changes in specific economic or political conditions that affect a particular type of issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security’s or instrument’s credit quality or value. Certain securities in which the fund may invest, including securities issued by certain U.S. government agencies and U.S. government sponsored enterprises, are not guaranteed by the U.S. government or supported by the full faith and credit of the United States. Mortgage-backed investments carry the risk that they may increase in value less when interest rates decline and decline in value more when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields.

The fund may not achieve its goal and is not intended to be a complete investment program.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 0.00%

Best calendar quarter
Q3 07 1.27%

Worst calendar quarter
Q4 15 0.00%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Government Money Market Fund
1 Year
5 Years
10 Years
Class IA 0.01% 0.01% 1.28%
Class IB 0.01% 0.01% 1.19%
Lipper VP (Underlying Funds) - Money Markets Funds Category Average (0.03%) (0.02%) 1.16%
v3.4.0.3
Putnam VT Growth and Income Fund
Goal
Putnam VT Growth and Income Fund seeks capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Growth and Income Fund
Class IA
Class IB
Management fees 0.47% 0.47%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.11% 0.11%
Total annual fund operating expenses 0.58% 0.83%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Growth and Income Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 59 186 324 726
Class IB 85 265 460 1,025
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 36%.
Investments
We invest mainly in common stocks of large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -1.05%

Best calendar quarter
Q2 09 19.55%

Worst calendar quarter
Q4 08 -21.39%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Growth and Income Fund
1 Year
5 Years
10 Years
Class IA (7.36%) 9.81% 4.83%
Class IB (7.57%) 9.55% 4.57%
Russell 1000 Value Index (no deduction for fees or expenses) (3.83%) 11.27% 6.16%
v3.4.0.3
Putnam VT Growth Opportunities Fund
Goal
Putnam VT Growth Opportunities Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Growth Opportunities Fund
Class IA
Class IB
Management fees 0.55% 0.55%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.36% 0.36%
Total annual fund operating expenses 0.91% 1.16%
Expense reimbursement [1] (0.09%) (0.09%)
Total annual fund operating expenses after expenses reimbursement 0.82% 1.07%
[1] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through 4/30/17. This obligation may be modified or discontinued only with approval of the fund's Board of Trustees.
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Expense Example - Putnam VT Growth Opportunities Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 84 281 495 1,111
Class IB 109 360 630 1,401
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 79%.
Investments
We invest mainly in common stocks of large U.S. companies, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -1.99%

Best calendar quarter
Q1 12 18.22%

Worst calendar quarter
Q4 08 -21.27%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Growth Opportunities Fund
1 Year
5 Years
10 Years
Class IA 1.28% 12.34% 7.87%
Class IB 1.03% 12.05% 7.60%
Russell 1000 Growth Index (no deduction for fees or expenses) 5.67% 13.53% 8.53%
v3.4.0.3
Putnam VT High Yield Fund
Goal
Putnam VT High Yield Fund seeks high current income.
Capital growth is a secondary goal when consistent with achieving high current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT High Yield Fund
Class IA
Class IB
Management fees 0.56% 0.56%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.14% 0.14%
Total annual fund operating expenses 0.70% 0.95%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT High Yield Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 72 224 390 871
Class IB 97 303 525 1,166
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 35%.
Investments
We invest mainly in bonds that are obligations of U.S. companies, are below-investment-grade in quality (sometimes referred to as “junk bonds”), and have intermediate- to long-term maturities (three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in securities rated below-investment-grade. This policy may be changed only after 60 days’ notice to shareholders. We may also invest in other debt instruments, including loans. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments).

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 2.85%

Best calendar quarter
Q2 09 18.84%

Worst calendar quarter
Q4 08 -19.22%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT High Yield Fund
1 Year
5 Years
10 Years
Class IA (5.14%) 4.37% 6.07%
Class IB (5.35%) 4.12% 5.82%
JPMorgan Developed High Yield Index (no deduction for fees or expenses) (4.53%) 5.45% 7.14%
v3.4.0.3
Putnam VT Income Fund
Goal
Putnam VT Income Fund seeks high current income consistent with what Putnam Investment Management, LLC believes to be prudent risk.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Income Fund
Class IA
Class IB
Management fees 0.39% 0.39%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.17% 0.17%
Total annual fund operating expenses 0.56% 0.81%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Income Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 57 179 313 701
Class IB 83 259 450 1,002
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 868%.
Investments
We invest mainly in bonds that are securitized debt instruments (such as mortgage-backed investments) and other obligations of companies and governments worldwide denominated in U.S. dollars, are either investment-grade or below-investment-grade in quality (sometimes referred to as “junk bonds”) and have intermediate- to long-term maturities (three years or longer).

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments). Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -0.24%

Best calendar quarter
Q2 09 14.35%

Worst calendar quarter
Q4 08 -17.63%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Income Fund
1 Year
5 Years
10 Years
Class IA (1.19%) 4.69% 5.57%
Class IB (1.46%) 4.44% 5.29%
Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses) 0.55% 3.25% 4.51%
v3.4.0.3
Putnam VT International Equity Fund
Goal
Putnam VT International Equity Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT International Equity Fund
Class IA
Class IB
Management fees 0.69% 0.69%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.15% 0.15%
Total annual fund operating expenses 0.84% 1.09%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT International Equity Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 86 268 466 1,037
Class IB 111 347 601 1,329
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 66%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies outside the United States that we believe have favorable investment potential.

For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments. This policy may be changed only after 60 days’ notice to shareholders. We may also consider other factors that we believe will cause the stock price to rise.

We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -3.85%

Best calendar quarter
Q2 09 22.55%

Worst calendar quarter
Q3 11 -24.07%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT International Equity Fund
1 Year
5 Years
10 Years
Class IA 0.41% 4.17% 2.82%
Class IB 0.14% 3.90% 2.56%
MSCI EAFE Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends) (0.81%) 3.60% 3.03%
v3.4.0.3
Putnam VT International Growth Fund
Goal
Putnam VT International Growth Fund seeks long-term capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT International Growth Fund
Class IA
Class IB
Management fees 0.92% 0.92%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.37% 0.37%
Total annual fund operating expenses 1.29% 1.54%
Expense reimbursement [1] (0.09%) (0.09%)
Total annual fund operating expenses after expenses reimbursement 1.20% 1.45%
[1] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through 4/30/17. This obligation may be modified or discontinued only with approval of the fund's Board of Trustees.
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund's operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Expense Example - Putnam VT International Growth Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 122 400 699 1,549
Class IB 148 478 831 1,827
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 83%.
Investments
We invest mainly in common stocks of companies of any size in established and emerging markets outside the United States. We invest mainly in growth stocks, which are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -4.50%

Best calendar quarter
Q2 09 23.00%

Worst calendar quarter
Q3 11 -24.72%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT International Growth Fund
1 Year
5 Years
10 Years
Class IA 1.33% 3.16% 4.19%
Class IB 1.12% 2.90% 3.94%
MSCI EAFE Growth Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends) 4.09% 4.60% 4.03%
v3.4.0.3
Putnam VT International Value Fund
Goal
Putnam VT International Value Fund seeks capital growth.
Current income is a secondary objective.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT International Value Fund
Class IA
Class IB
Management fees 0.69% 0.69%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.19% 0.19%
Total annual fund operating expenses 0.88% 1.13%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT International Value Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 90 281 488 1,084
Class IB 115 359 622 1,375
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 29%.
Investments
We invest mainly in common stocks of large and midsize companies outside the United States, with a focus on value stocks.

Value stocks are those that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -2.22%

Best calendar quarter
Q2 09 23.79%

Worst calendar quarter
Q4 08 -23.24%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT International Value Fund
1 Year
5 Years
10 Years
Class IA (1.71%) 2.87% 1.49%
Class IB (2.00%) 2.61% 1.23%
MSCI EAFE Value Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends) (5.68%) 2.55% 1.96%
v3.4.0.3
Putnam VT Investors Fund
Goal
Putnam VT Investors Fund seeks long-term growth of capital and any increased income that results from this growth.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Investors Fund
Class IA
Class IB
Management fees 0.55% 0.55%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.14% 0.14%
Total annual fund operating expenses 0.69% 0.94%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Investors Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 70 221 384 859
Class IB 96 300 520 1,155
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 47%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -1.21%

Best calendar quarter
Q2 09 18.61%

Worst calendar quarter
Q4 08 -21.46%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Investors Fund
1 Year
5 Years
10 Years
Class IA (1.96%) 12.25% 5.80%
Class IB (2.18%) 11.97% 5.53%
S&P 500 Index (no deduction for fees or expenses) 1.38% 12.57% 7.31%
v3.4.0.3
Putnam VT Multi-Cap Growth Fund
Goal
Putnam VT Multi-Cap Growth Fund seeks long-term capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Multi-Cap Growth Fund
Class IA
Class IB
Management fees 0.55% 0.55%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.11% 0.11%
Total annual fund operating expenses 0.66% 0.91%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Multi-Cap Growth Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 67 211 368 822
Class IB 93 290 504 1,120
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 66%.
Investments
We invest mainly in common stocks of U.S. companies of any size, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -1.77%

Best calendar quarter
Q1 12 18.06%

Worst calendar quarter
Q4 08 -22.18%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Multi-Cap Growth Fund
1 Year
5 Years
10 Years
Class IA (0.07%) 11.61% 6.90%
Class IB (0.29%) 11.34% 6.63%
Russell 3000 Growth Index (no deduction for fees or expenses) 5.09% 13.30% 8.49%
v3.4.0.3
Putnam VT Multi-Cap Value Fund
Goal
Putnam VT Multi-Cap Value Fund seeks capital appreciation and,
as a secondary objective, current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Multi-Cap Value Fund
Class IA
Class IB
Management fees 0.55% 0.55%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.22% 0.22%
Total annual fund operating expenses 0.77% 1.02%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Multi-Cap Value Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 79 246 428 954
Class IB 104 325 563 1,248
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 82%.
Investments
We invest mainly in common stocks of U.S. companies of any size, with a focus on value stocks. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. However, prior to becoming Putnam VT Multi- Cap Value Fund on September 1, 2010, the fund (as Putnam VT Mid-Cap Value Fund) invested at least 80% of its net assets in midsize companies, and the performance information below may have differed if the fund had instead pursued a multi-cap value investment strategy during the time periods presented. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 2.37%

Best calendar quarter
Q2 09 24.85%

Worst calendar quarter
Q4 08 -26.41%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Multi-Cap Value Fund
1 Year
5 Years
10 Years
Class IA (4.06%) 10.96% 6.99%
Class IB (4.27%) 10.69% 6.72%
Russell 3000 Value Index (no deduction for fees or expenses) (4.13%) 10.98% 6.11%
v3.4.0.3
Putnam VT Research Fund
Goal
Putnam VT Research Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Research Fund
Class IA
Class IB
Management fees 0.55% 0.55%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.26% 0.26%
Total annual fund operating expenses 0.81% 1.06%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Research Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 83 259 450 1,002
Class IB 108 337 585 1,294
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 90%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -0.47%

Best calendar quarter
Q2 09 18.46%

Worst calendar quarter
Q4 08 -24.03%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Research Fund
1 Year
5 Years
10 Years
Class IA (1.29%) 12.11% 6.69%
Class IB (1.50%) 11.82% 6.43%
S&P 500 Index (no deduction for fees or expenses) 1.38% 12.57% 7.31%
v3.4.0.3
Putnam VT Small Cap Value Fund
Goal
Putnam VT Small Cap Value Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Small Cap Value Fund
Class IA
Class IB
Management fees 0.62% 0.62%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.14% 0.14%
Acquired fund fees and expenses 0.26% 0.26%
Total annual fund operating expenses 1.02% 1.27%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Small Cap Value Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 104 325 563 1,248
Class IB 129 403 697 1,534
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 52%.
Investments
We invest mainly in common stocks of small U.S. companies, with a focus on value stocks. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. Under normal circumstances, we invest at least 80% of the fund’s net assets in companies of a size similar to those in the Russell 2000 Value Index. This policy may be changed only after 60 days’ notice to shareholders. As of March 31, 2016, the index was composed of companies having market capitalizations of between approximately $13.8 million and $5.9 billion. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -1.14%

Best calendar quarter
Q2 09 25.25%

Worst calendar quarter
Q4 08 -28.70%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Small Cap Value Fund
1 Year
5 Years
10 Years
Class IA (3.90%) 9.41% 5.02%
Class IB (4.24%) 9.13% 4.76%
Russell 2000 Value Index (no deduction for fees or expenses) (7.47%) 7.67% 5.57%
v3.4.0.3
Putnam VT Voyager Fund
Goal
Putnam VT Voyager Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses - Putnam VT Voyager Fund
Class IA
Class IB
Management fees 0.55% 0.55%
Distribution and service (12b-1) fees   0.25%
Other expenses 0.13% 0.13%
Total annual fund operating expenses 0.68% 0.93%
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example - Putnam VT Voyager Fund - USD ($)
Expense Example, with Redemption, 1 Year
Expense Example, with Redemption, 3 Years
Expense Example, with Redemption, 5 Years
Expense Example, with Redemption, 10 Years
Class IA 69 218 379 847
Class IB 95 296 515 1,143
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 146%.
Investments
We invest mainly in common stocks of midsize and large U.S. companies, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
Bar Chart
Year to date performance
through 3/31/16 -4.15%

Best calendar quarter
Q2 09 28.30%

Worst calendar quarter
Q3 11 -24.00%
Average annual total returns
(for periods ending 12/31/15)
Average Annual Total Returns - Putnam VT Voyager Fund
1 Year
5 Years
10 Years
Class IA (5.88%) 7.06% 7.04%
Class IB (6.11%) 6.80% 6.78%
Russell 1000 Growth Index (no deduction for fees or expenses) 5.67% 13.53% 8.53%
v3.4.0.3
Total
Putnam VT American Government Income Fund
Fund summary
Goal
Putnam VT American Government Income Fund seeks high current income
with preservation of capital as its secondary objective.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003871Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003871Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 905%.
Investments
We invest mainly in bonds and securitized debt instruments (such as mortgage-backed investments) that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bonds and Ginnie Mae mortgage-backed bonds) or by only the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds), and that have short- to long-term maturities. Under normal circumstances, we invest at least 80% of the fund’s net assets in U.S. government securities. We may invest up to 20% of the fund’s net assets in mortgage-backed and other asset-backed securities of private (non-governmental) issuers and securities issued by money market funds, in each case rated AAA or its equivalent at the time of purchase by a nationally recognized securities rating agency or, if unrated, that we determine to be of comparable quality. This policy may be changed only after 60 days’ notice to shareholders.

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options, and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Credit risk is generally greater for debt not backed by the full faith and credit of the U.S. government, and interest rate risk is generally greater for longer-term bonds. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003871Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 0.36%

Best calendar quarter
Q1 09 5.84%

Worst calendar quarter
Q3 08 -2.70%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003871Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Growth Opportunities Fund
Fund summary
Goal
Putnam VT Growth Opportunities Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003873Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003873Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 79%.
Investments
We invest mainly in common stocks of large U.S. companies, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003873Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -1.99%

Best calendar quarter
Q1 12 18.22%

Worst calendar quarter
Q4 08 -21.27%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003873Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Global Health Care Fund
Fund summary
Goal
Putnam VT Global Health Care Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003874Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003874Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 16%.
Investments
For this non-diversified fund concentrating in the health care industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in securities of companies in the health care industries. This policy may be changed only after 60 days’ notice to shareholders. Potential investments include companies that manufacture health care supplies or provide health care-related services, and companies in the research, development, production and marketing of pharmaceuticals and biotechnology products. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The health care industries may be affected by technological obsolescence, changes in regulatory approval policies for drugs, medical devices or procedures and changes in governmental and private payment systems. Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003874Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -10.87%

Best calendar quarter
Q1 13 13.10%

Worst calendar quarter
Q3 11 -17.93%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003874Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT High Yield Fund
Fund summary
Goal
Putnam VT High Yield Fund seeks high current income.
Capital growth is a secondary goal when consistent with achieving high current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003875Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003875Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 35%.
Investments
We invest mainly in bonds that are obligations of U.S. companies, are below-investment-grade in quality (sometimes referred to as “junk bonds”), and have intermediate- to long-term maturities (three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in securities rated below-investment-grade. This policy may be changed only after 60 days’ notice to shareholders. We may also invest in other debt instruments, including loans. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments).

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003875Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 2.85%

Best calendar quarter
Q2 09 18.84%

Worst calendar quarter
Q4 08 -19.22%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003875Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Income Fund
Fund summary
Goal
Putnam VT Income Fund seeks high current income consistent with what Putnam Investment Management, LLC believes to be prudent risk.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003876Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003876Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 868%.
Investments
We invest mainly in bonds that are securitized debt instruments (such as mortgage-backed investments) and other obligations of companies and governments worldwide denominated in U.S. dollars, are either investment-grade or below-investment-grade in quality (sometimes referred to as “junk bonds”) and have intermediate- to long-term maturities (three years or longer).

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments). Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003876Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -0.24%

Best calendar quarter
Q2 09 14.35%

Worst calendar quarter
Q4 08 -17.63%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003876Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT International Equity Fund
Fund summary
Goal
Putnam VT International Equity Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003877Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003877Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 66%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies outside the United States that we believe have favorable investment potential.

For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments. This policy may be changed only after 60 days’ notice to shareholders. We may also consider other factors that we believe will cause the stock price to rise.

We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003877Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -3.85%

Best calendar quarter
Q2 09 22.55%

Worst calendar quarter
Q3 11 -24.07%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003877Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT International Value Fund
Fund summary
Goal
Putnam VT International Value Fund seeks capital growth.
Current income is a secondary objective.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003878Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003878Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 29%.
Investments
We invest mainly in common stocks of large and midsize companies outside the United States, with a focus on value stocks.

Value stocks are those that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003878Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -2.22%

Best calendar quarter
Q2 09 23.79%

Worst calendar quarter
Q4 08 -23.24%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003878Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT International Growth Fund
Fund summary
Goal
Putnam VT International Growth Fund seeks long-term capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003879Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund's operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003879Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 83%.
Investments
We invest mainly in common stocks of companies of any size in established and emerging markets outside the United States. We invest mainly in growth stocks, which are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003879Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -4.50%

Best calendar quarter
Q2 09 23.00%

Worst calendar quarter
Q3 11 -24.72%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003879Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Investors Fund
Fund summary
Goal
Putnam VT Investors Fund seeks long-term growth of capital and any increased income that results from this growth.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003880Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003880Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 47%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003880Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -1.21%

Best calendar quarter
Q2 09 18.61%

Worst calendar quarter
Q4 08 -21.46%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003880Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Multi-Cap Value Fund
Fund summary
Goal
Putnam VT Multi-Cap Value Fund seeks capital appreciation and,
as a secondary objective, current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003881Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003881Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 82%.
Investments
We invest mainly in common stocks of U.S. companies of any size, with a focus on value stocks. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. However, prior to becoming Putnam VT Multi- Cap Value Fund on September 1, 2010, the fund (as Putnam VT Mid-Cap Value Fund) invested at least 80% of its net assets in midsize companies, and the performance information below may have differed if the fund had instead pursued a multi-cap value investment strategy during the time periods presented. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003881Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 2.37%

Best calendar quarter
Q2 09 24.85%

Worst calendar quarter
Q4 08 -26.41%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003881Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Government Money Market Fund
Fund summary
Goal
Putnam VT Government Money Market Fund seeks as high a rate of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital and maintenance of liquidity.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003882Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003882Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Investments
We invest at least 99.5 percent of the fund’s total assets in cash, U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities or cash. We invest mainly in debt securities that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bills) or by the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds). The U.S. government securities in which we invest may also include variable and floating rate instruments and when-issued and delayed delivery securities (i.e., payment or delivery of the securities occurs at a future date for a predetermined price). Under normal circumstances, we invest at least 80% of the fund’s net assets in U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities. This policy may be changed only after 60 days’ notice to shareholders. The securities purchased by the fund are subject to quality, maturity, diversification and other requirements pursuant to rules promulgated by the Securities and Exchange Commission. We may consider, among other factors, credit and interest rate risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risks
You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, there is no guarantee that the fund will be able to do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The fund’s sponsor has no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time.

The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund’s investments). Although the fund only buys high quality investments, investments backed by a letter of credit carry the risk that the provider of the letter of credit will not be able to fulfill its obligations to the issuer. Changes in the financial condition of an issuer or counterparty, changes in specific economic or political conditions that affect a particular type of issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security’s or instrument’s credit quality or value. Certain securities in which the fund may invest, including securities issued by certain U.S. government agencies and U.S. government sponsored enterprises, are not guaranteed by the U.S. government or supported by the full faith and credit of the United States. Mortgage-backed investments carry the risk that they may increase in value less when interest rates decline and decline in value more when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields.

The fund may not achieve its goal and is not intended to be a complete investment program.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003882Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 0.00%

Best calendar quarter
Q3 07 1.27%

Worst calendar quarter
Q4 15 0.00%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003882Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Capital Opportunities Fund
Fund summary
Goal
Putnam VT Capital Opportunities Fund seeks long-term growth of capital.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003883Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003883Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 21%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of small and midsize U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003883Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -0.46%

Best calendar quarter
Q2 09 24.01%

Worst calendar quarter
Q4 08 -24.85%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003883Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
As of April 1, 2016, the Russell 2000 Index (an unmanaged index of 2,000 small companies in the Russell 3000 Index) replaced the Russell 2500 Index (an unmanaged index of 2,500 small and midsize companies in the Russell 3000 Index) as the benchmark for this fund because, in Putnam Investment Management, LLC’s opinion, the securities tracked by this index more accurately reflect the types of securities that generally will be held by the fund. The average annual total returns of the Russell 2500 Index for the one-, five-, and ten-year periods ended on December 31, 2015 were –2.90%, 10.32%, and 7.56%, respectively.
Putnam VT Multi-Cap Growth Fund
Fund summary
Goal
Putnam VT Multi-Cap Growth Fund seeks long-term capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003884Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003884Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 66%.
Investments
We invest mainly in common stocks of U.S. companies of any size, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003884Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -1.77%

Best calendar quarter
Q1 12 18.06%

Worst calendar quarter
Q4 08 -22.18%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003884Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Research Fund
Fund summary
Goal
Putnam VT Research Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003887Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003887Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 90%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003887Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -0.47%

Best calendar quarter
Q2 09 18.46%

Worst calendar quarter
Q4 08 -24.03%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003887Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Small Cap Value Fund
Fund summary
Goal
Putnam VT Small Cap Value Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003888Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003888Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 52%.
Investments
We invest mainly in common stocks of small U.S. companies, with a focus on value stocks. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. Under normal circumstances, we invest at least 80% of the fund’s net assets in companies of a size similar to those in the Russell 2000 Value Index. This policy may be changed only after 60 days’ notice to shareholders. As of March 31, 2016, the index was composed of companies having market capitalizations of between approximately $13.8 million and $5.9 billion. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003888Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -1.14%

Best calendar quarter
Q2 09 25.25%

Worst calendar quarter
Q4 08 -28.70%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003888Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Global Utilities Fund
Fund summary
Goal
Putnam VT Global Utilities Fund seeks capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003889Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003889Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 17%.
Investments
For this non-diversified fund concentrating in the utilities industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in securities of companies worldwide in the utilities industries. This policy may be changed only after 60 days’ notice to shareholders. Potential investments include electric, gas or water utilities and companies that operate as independent producers and/or distributors of power. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The utilities industries may be affected by increases in fuel costs, technological obsolescence, changes in regulatory policies and deregulation. Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003889Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 9.40%

Best calendar quarter
Q2 09 14.09%

Worst calendar quarter
Q3 08 -19.64%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003889Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Voyager Fund
Fund summary
Goal
Putnam VT Voyager Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003891Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003891Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 146%.
Investments
We invest mainly in common stocks of midsize and large U.S. companies, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003891Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -4.15%

Best calendar quarter
Q2 09 28.30%

Worst calendar quarter
Q3 11 -24.00%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003891Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Diversified Income Fund
Fund summary
Goal
Putnam VT Diversified Income Fund seeks as high a level of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003893Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003893Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 876%.
Investments
We invest mainly in bonds that are securitized debt instruments (such as mortgage-backed investments) and other obligations of companies and governments worldwide, are either investment-grade or below-investment-grade in quality (sometimes referred to as “junk bonds”) and have intermediate- to long-term maturities (three years or longer).

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options, certain foreign currency transactions and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments). Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.


The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003893Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -4.01%

Best calendar quarter
Q2 09 18.40%

Worst calendar quarter
Q4 08 -21.54%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003893Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Equity Income Fund
Fund summary
Goal
Putnam VT Equity Income Fund seeks capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003894Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003894Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 22%.
Investments
We invest mainly in common stocks of midsize and large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Under normal circumstances, we invest at least 80% of the fund’s net assets in common stocks and other equity investments that offer the potential for current income. This policy may be changed only after 60 days’ notice to shareholders. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003894Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 0.41%

Best calendar quarter
Q2 09 18.31%

Worst calendar quarter
Q4 08 -18.93%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003894Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT George Putnam Balanced Fund
Fund summary
Goal
Putnam VT George Putnam Balanced Fund seeks to provide a balanced investment composed of a well-diversified portfolio of stocks and bonds which produce both capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003895Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003895Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 223%.
Investments
We invest mainly in a combination of bonds and common stocks (growth or value stocks or both) of large U.S. companies, with a greater focus on common stocks. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We buy bonds of governments and private companies that are mostly investment-grade in quality with intermediate- to long-term maturities (three years or longer). We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”) which may be considered speculative.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003895Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 0.51%

Best calendar quarter
Q2 09 13.04%

Worst calendar quarter
Q4 08 -27.53%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003895Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
The fund's performance is compared to the Barclays U.S. Aggregate Bond Index, an unmanaged index of U.S. investment-grade fixed income securities. The fund's performance is also compared to the S&P 500 Index, an unmanaged index of large U. S. company stocks. In addition, the fund’s performance is compared to the George Putnam Blended Index, an unmanaged index administered by Putnam Management, 60% of which is the S&P 500 Index and 40% of which is the Barclays U.S. Aggregate Bond Index.
Putnam VT Global Asset Allocation Fund
Fund summary
Goal
Putnam VT Global Asset Allocation Fund seeks long-term return consistent with preservation of capital.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003896Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003896Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 339%.
Investments
We invest a majority of the fund’s assets in a diversified portfolio of equity securities (growth or value stocks or both) of both U.S. and foreign companies of any size. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We also invest in a diversified portfolio of fixed-income investments, including both U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments.

We may also select other investments that do not fall within these asset classes. We may also use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

Our allocation of assets among asset classes may hurt performance. The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”), which may be considered speculative. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-and asset-backed investments, in other investments with less attractive terms and yields.

The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003896Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -0.32%

Best calendar quarter
Q2 09 16.12%

Worst calendar quarter
Q4 08 -19.54%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003896Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam Balanced Blended Benchmark is an unmanaged index administered by Putnam Investment Management, LLC, 50% of which is the Russell 3000 Index, 35% of which is the Barclays U.S. Aggregate Bond Index, 10% of which is the MSCI/EAFE Index (ND) and 5% of which is the JPMorgan Developed High Yield Index.
Putnam VT Global Equity Fund
Fund summary
Goal
Putnam VT Global Equity Fund seeks capital appreciation.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003897Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003897Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 56%.
Investments
We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments. This policy may be changed only after 60 days’ notice to shareholders. We may also consider other factors that we believe will cause the stock price to rise.

We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003897Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -3.76%

Best calendar quarter
Q2 09 22.27%

Worst calendar quarter
Q4 08 -23.60%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003897Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Growth and Income Fund
Fund summary
Goal
Putnam VT Growth and Income Fund seeks capital growth and current income.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000003898Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000003898Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 36%.
Investments
We invest mainly in common stocks of large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risks
It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000003898Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -1.05%

Best calendar quarter
Q2 09 19.55%

Worst calendar quarter
Q4 08 -21.39%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000003898Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Putnam VT Absolute Return 500 Fund Fund
Fund summary
Goal
Putnam VT Absolute Return 500 Fund seeks to earn a positive total return that exceeds the return on U.S. Treasury bills by 500 basis points (or 5.00%) on an annualized basis over a reasonable period of time (generally at least three years or more) regardless of market conditions.
Fees and expenses
The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column period compact * column dei_LegalEntityAxis compact PVT_S000032103Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Example
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
~ http://xbrl.sec.gov/rr/role/ExpenseExample column period compact * column dei_LegalEntityAxis compact PVT_S000032103Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Portfolio turnover
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 520%.
Investments
The fund is designed to pursue a consistent absolute return by combining two independent investment strategies — a beta strategy, which provides broad exposure to investment markets, and an alpha strategy, which seeks returns from active trading. The beta strategy seeks to balance risk and to provide positive total return by investing, without limit, in many different asset classes, including U.S., international, and emerging markets equity securities (growth or value stocks or both) and fixed-income securities; mortgage- and asset-backed securities; below-investment-grade securities (sometimes referred to as “junk bonds”); inflation-protected securities; commodities; and real estate investment trusts (REITs). The alpha strategy involves the potential use of active trading strategies designed to provide additional total return through active security selection, tactical asset allocation, currency transactions and options transactions. In pursuing a consistent absolute return, the fund’s strategies are also generally intended to produce lower volatility over a reasonable period of time than has been historically associated with traditional asset classes that have earned similar levels of return over long historical periods. These traditional asset classes might include, for example, balanced portfolios with significant exposure to both stocks and bonds.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks when deciding whether to buy or sell fixed-income investments. We may also take into account general market conditions when making investment decisions. We typically use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, to a significant extent for hedging purposes and to increase the fund’s exposure to the asset classes and strategies mentioned above, which may create investment leverage.

Risks
It is important to understand that you can lose money by investing in the fund.

Our allocation of assets among asset classes may hurt performance. The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Default risk is generally higher for non-qualified mortgages. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which may be considered speculative. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation) and may be or become illiquid. Our alpha strategy may lose money or not earn a return sufficient to cover associated trading and other costs. Our use of leverage obtained through derivatives increases these risks by increasing investment exposure. Derivatives also involve the risk, in the case of many over-the-counter instruments, of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. The fund’s efforts to produce lower volatility returns may not be successful and may make it more difficult at times for the fund to achieve its targeted return. In addition, under certain market conditions, the fund may accept greater volatility than would typically be the case, in order to seek its targeted return. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Investor profile

The fund is designed for investors seeking positive total return in excess of the return on U.S. Treasury bills by a targeted amount (500 basis points) on an annualized basis over a reasonable period of time regardless of market conditions. Because the fund seeks performance over a reasonable period of time, investors should be willing to wait out short-term market fluctuations and should generally have an investment horizon of at least three years or more. The fund may be suitable for you if you are considering a balanced fund, or a fund that can manage allocations and risk across global asset classes.
Performance
The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Annual total returns for class IA shares
~ http://xbrl.sec.gov/rr/role/BarChartData column period compact * column dei_LegalEntityAxis compact PVT_S000032103Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
Year to date performance
through 3/31/16 -1.26%

Best calendar quarter
Q1 12 4.57%

Worst calendar quarter
Q2 13 -1.55%
Average annual total returns
(for periods ending 12/31/15)
~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * column dei_LegalEntityAxis compact PVT_S000032103Member column rr_ProspectusShareClassAxis compact * row primary compact * ~
The Barclays U.S. Aggregate Bond Index and the S&P 500 Index are broad measures of market performance. Securities in the fund do not match those in the indexes and the performance of the fund will differ.
v3.4.0.3
Label Element Value
Risk Return Abstract rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Dec. 31, 2015
Registrant Name dei_EntityRegistrantName PUTNAM VARIABLE TRUST
Central Index Key dei_EntityCentralIndexKey 0000822671
Amendment Flag dei_AmendmentFlag false
Trading Symbol dei_TradingSymbol PVT
Document Creation Date dei_DocumentCreationDate Apr. 26, 2016
Document Effective Date dei_DocumentEffectiveDate Apr. 30, 2016
Prospectus Date rr_ProspectusDate Apr. 30, 2016
Putnam VT American Government Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT American Government Income Fund seeks high current income
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock with preservation of capital as its secondary objective.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 905%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 905.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in bonds and securitized debt instruments (such as mortgage-backed investments) that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bonds and Ginnie Mae mortgage-backed bonds) or by only the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds), and that have short- to long-term maturities. Under normal circumstances, we invest at least 80% of the fund’s net assets in U.S. government securities. We may invest up to 20% of the fund’s net assets in mortgage-backed and other asset-backed securities of private (non-governmental) issuers and securities issued by money market funds, in each case rated AAA or its equivalent at the time of purchase by a nationally recognized securities rating agency or, if unrated, that we determine to be of comparable quality. This policy may be changed only after 60 days’ notice to shareholders.

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options, and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Credit risk is generally greater for debt not backed by the full faith and credit of the U.S. government, and interest rate risk is generally greater for longer-term bonds. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 0.36%

Best calendar quarter
Q1 09 5.84%

Worst calendar quarter
Q3 08 -2.70%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.36%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.84%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.70%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT American Government Income Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.39%
Other expenses rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 0.62%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 63
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 199
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 346
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 774
Annual Return 2006 rr_AnnualReturn2006 3.51%
Annual Return 2007 rr_AnnualReturn2007 8.63%
Annual Return 2008 rr_AnnualReturn2008 0.54%
Annual Return 2009 rr_AnnualReturn2009 21.35%
Annual Return 2010 rr_AnnualReturn2010 5.35%
Annual Return 2011 rr_AnnualReturn2011 7.09%
Annual Return 2012 rr_AnnualReturn2012 2.16%
Annual Return 2013 rr_AnnualReturn2013 (0.19%)
Annual Return 2014 rr_AnnualReturn2014 4.49%
Annual Return 2015 rr_AnnualReturn2015 (0.33%)
1 Year rr_AverageAnnualReturnYear01 (0.33%)
5 Years rr_AverageAnnualReturnYear05 2.60%
10 Years rr_AverageAnnualReturnYear10 5.09%
Putnam VT American Government Income Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.39%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 0.87%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 89
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 278
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 482
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,073
1 Year rr_AverageAnnualReturnYear01 (0.65%)
5 Years rr_AverageAnnualReturnYear05 2.33%
10 Years rr_AverageAnnualReturnYear10 4.82%
Putnam VT American Government Income Fund | Barclays Government Bond Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.86%
5 Years rr_AverageAnnualReturnYear05 2.77%
10 Years rr_AverageAnnualReturnYear10 4.10%
Putnam VT Growth Opportunities Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Growth Opportunities Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 04-30-2017
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 79%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 79.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of large U.S. companies, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -1.99%

Best calendar quarter
Q1 12 18.22%

Worst calendar quarter
Q4 08 -21.27%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.99%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.22%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.27%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Growth Opportunities Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Other expenses rr_OtherExpensesOverAssets 0.36%
Total annual fund operating expenses rr_ExpensesOverAssets 0.91%
Expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total annual fund operating expenses after expenses reimbursement rr_NetExpensesOverAssets 0.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 84
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 281
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 495
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,111
Annual Return 2006 rr_AnnualReturn2006 8.75%
Annual Return 2007 rr_AnnualReturn2007 5.82%
Annual Return 2008 rr_AnnualReturn2008 (37.63%)
Annual Return 2009 rr_AnnualReturn2009 41.26%
Annual Return 2010 rr_AnnualReturn2010 17.57%
Annual Return 2011 rr_AnnualReturn2011 (3.86%)
Annual Return 2012 rr_AnnualReturn2012 17.85%
Annual Return 2013 rr_AnnualReturn2013 36.55%
Annual Return 2014 rr_AnnualReturn2014 14.36%
Annual Return 2015 rr_AnnualReturn2015 1.28%
1 Year rr_AverageAnnualReturnYear01 1.28%
5 Years rr_AverageAnnualReturnYear05 12.34%
10 Years rr_AverageAnnualReturnYear10 7.87%
Putnam VT Growth Opportunities Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.36%
Total annual fund operating expenses rr_ExpensesOverAssets 1.16%
Expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total annual fund operating expenses after expenses reimbursement rr_NetExpensesOverAssets 1.07%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 109
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 360
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 630
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,401
1 Year rr_AverageAnnualReturnYear01 1.03%
5 Years rr_AverageAnnualReturnYear05 12.05%
10 Years rr_AverageAnnualReturnYear10 7.60%
Putnam VT Growth Opportunities Fund | Russell 1000 Growth Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.67%
5 Years rr_AverageAnnualReturnYear05 13.53%
10 Years rr_AverageAnnualReturnYear10 8.53%
Putnam VT Global Health Care Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Global Health Care Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 16%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 16.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock For this non-diversified fund concentrating in the health care industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in securities of companies in the health care industries. This policy may be changed only after 60 days’ notice to shareholders. Potential investments include companies that manufacture health care supplies or provide health care-related services, and companies in the research, development, production and marketing of pharmaceuticals and biotechnology products. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration For this non-diversified fund concentrating in the health care industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The health care industries may be affected by technological obsolescence, changes in regulatory approval policies for drugs, medical devices or procedures and changes in governmental and private payment systems. Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -10.87%

Best calendar quarter
Q1 13 13.10%

Worst calendar quarter
Q3 11 -17.93%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (10.87%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.10%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.93%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Global Health Care Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Other expenses rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 0.75%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 77
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 240
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 417
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 930
Annual Return 2006 rr_AnnualReturn2006 3.06%
Annual Return 2007 rr_AnnualReturn2007 (0.36%)
Annual Return 2008 rr_AnnualReturn2008 (16.90%)
Annual Return 2009 rr_AnnualReturn2009 26.46%
Annual Return 2010 rr_AnnualReturn2010 2.67%
Annual Return 2011 rr_AnnualReturn2011 (0.89%)
Annual Return 2012 rr_AnnualReturn2012 22.57%
Annual Return 2013 rr_AnnualReturn2013 41.98%
Annual Return 2014 rr_AnnualReturn2014 27.96%
Annual Return 2015 rr_AnnualReturn2015 8.06%
1 Year rr_AverageAnnualReturnYear01 8.06%
5 Years rr_AverageAnnualReturnYear05 18.98%
10 Years rr_AverageAnnualReturnYear10 10.20%
Putnam VT Global Health Care Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 318
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 552
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,225
1 Year rr_AverageAnnualReturnYear01 7.79%
5 Years rr_AverageAnnualReturnYear05 18.68%
10 Years rr_AverageAnnualReturnYear10 9.93%
Putnam VT Global Health Care Fund | MSCI World Health Care Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.60%
5 Years rr_AverageAnnualReturnYear05 17.15%
10 Years rr_AverageAnnualReturnYear10 9.25%
Putnam VT High Yield Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT High Yield Fund seeks high current income.
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock Capital growth is a secondary goal when consistent with achieving high current income.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 35%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 35.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in bonds that are obligations of U.S. companies, are below-investment-grade in quality (sometimes referred to as “junk bonds”), and have intermediate- to long-term maturities (three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in securities rated below-investment-grade. This policy may be changed only after 60 days’ notice to shareholders. We may also invest in other debt instruments, including loans. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments).

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 2.85%

Best calendar quarter
Q2 09 18.84%

Worst calendar quarter
Q4 08 -19.22%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 2.85%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.84%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.22%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT High Yield Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.56%
Other expenses rr_OtherExpensesOverAssets 0.14%
Total annual fund operating expenses rr_ExpensesOverAssets 0.70%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 72
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 224
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 390
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 871
Annual Return 2006 rr_AnnualReturn2006 10.60%
Annual Return 2007 rr_AnnualReturn2007 3.17%
Annual Return 2008 rr_AnnualReturn2008 (26.20%)
Annual Return 2009 rr_AnnualReturn2009 50.91%
Annual Return 2010 rr_AnnualReturn2010 14.54%
Annual Return 2011 rr_AnnualReturn2011 1.85%
Annual Return 2012 rr_AnnualReturn2012 16.34%
Annual Return 2013 rr_AnnualReturn2013 8.10%
Annual Return 2014 rr_AnnualReturn2014 1.91%
Annual Return 2015 rr_AnnualReturn2015 (5.14%)
1 Year rr_AverageAnnualReturnYear01 (5.14%)
5 Years rr_AverageAnnualReturnYear05 4.37%
10 Years rr_AverageAnnualReturnYear10 6.07%
Putnam VT High Yield Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.56%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.14%
Total annual fund operating expenses rr_ExpensesOverAssets 0.95%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 97
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 303
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 525
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,166
1 Year rr_AverageAnnualReturnYear01 (5.35%)
5 Years rr_AverageAnnualReturnYear05 4.12%
10 Years rr_AverageAnnualReturnYear10 5.82%
Putnam VT High Yield Fund | JPMorgan Developed High Yield Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.53%)
5 Years rr_AverageAnnualReturnYear05 5.45%
10 Years rr_AverageAnnualReturnYear10 7.14%
Putnam VT Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Income Fund seeks high current income consistent with what Putnam Investment Management, LLC believes to be prudent risk.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 868%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 868.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in bonds that are securitized debt instruments (such as mortgage-backed investments) and other obligations of companies and governments worldwide denominated in U.S. dollars, are either investment-grade or below-investment-grade in quality (sometimes referred to as “junk bonds”) and have intermediate- to long-term maturities (three years or longer).

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments). Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -0.24%

Best calendar quarter
Q2 09 14.35%

Worst calendar quarter
Q4 08 -17.63%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.24%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.35%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.63%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Income Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.39%
Other expenses rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 0.56%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 57
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 179
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 313
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 701
Annual Return 2006 rr_AnnualReturn2006 4.83%
Annual Return 2007 rr_AnnualReturn2007 5.45%
Annual Return 2008 rr_AnnualReturn2008 (23.78%)
Annual Return 2009 rr_AnnualReturn2009 47.22%
Annual Return 2010 rr_AnnualReturn2010 10.22%
Annual Return 2011 rr_AnnualReturn2011 5.16%
Annual Return 2012 rr_AnnualReturn2012 11.06%
Annual Return 2013 rr_AnnualReturn2013 2.13%
Annual Return 2014 rr_AnnualReturn2014 6.68%
Annual Return 2015 rr_AnnualReturn2015 (1.19%)
1 Year rr_AverageAnnualReturnYear01 (1.19%)
5 Years rr_AverageAnnualReturnYear05 4.69%
10 Years rr_AverageAnnualReturnYear10 5.57%
Putnam VT Income Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.39%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 259
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 450
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,002
1 Year rr_AverageAnnualReturnYear01 (1.46%)
5 Years rr_AverageAnnualReturnYear05 4.44%
10 Years rr_AverageAnnualReturnYear10 5.29%
Putnam VT Income Fund | Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.55%
5 Years rr_AverageAnnualReturnYear05 3.25%
10 Years rr_AverageAnnualReturnYear10 4.51%
Putnam VT International Equity Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT International Equity Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 66%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 66.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies outside the United States that we believe have favorable investment potential.

For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments. This policy may be changed only after 60 days’ notice to shareholders. We may also consider other factors that we believe will cause the stock price to rise.

We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -3.85%

Best calendar quarter
Q2 09 22.55%

Worst calendar quarter
Q3 11 -24.07%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (3.85%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.55%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (24.07%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT International Equity Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.69%
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 0.84%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 268
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 466
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,037
Annual Return 2006 rr_AnnualReturn2006 28.04%
Annual Return 2007 rr_AnnualReturn2007 8.61%
Annual Return 2008 rr_AnnualReturn2008 (43.84%)
Annual Return 2009 rr_AnnualReturn2009 25.00%
Annual Return 2010 rr_AnnualReturn2010 10.27%
Annual Return 2011 rr_AnnualReturn2011 (16.71%)
Annual Return 2012 rr_AnnualReturn2012 22.21%
Annual Return 2013 rr_AnnualReturn2013 28.44%
Annual Return 2014 rr_AnnualReturn2014 (6.58%)
Annual Return 2015 rr_AnnualReturn2015 0.41%
1 Year rr_AverageAnnualReturnYear01 0.41%
5 Years rr_AverageAnnualReturnYear05 4.17%
10 Years rr_AverageAnnualReturnYear10 2.82%
Putnam VT International Equity Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.69%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 1.09%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 111
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 347
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 601
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,329
1 Year rr_AverageAnnualReturnYear01 0.14%
5 Years rr_AverageAnnualReturnYear05 3.90%
10 Years rr_AverageAnnualReturnYear10 2.56%
Putnam VT International Equity Fund | MSCI EAFE Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.81%)
5 Years rr_AverageAnnualReturnYear05 3.60%
10 Years rr_AverageAnnualReturnYear10 3.03%
Putnam VT International Value Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT International Value Fund seeks capital growth.
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock Current income is a secondary objective.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 29%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 29.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of large and midsize companies outside the United States, with a focus on value stocks.

Value stocks are those that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -2.22%

Best calendar quarter
Q2 09 23.79%

Worst calendar quarter
Q4 08 -23.24%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (2.22%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 23.79%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (23.24%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT International Value Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.69%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 0.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 90
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 281
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 488
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,084
Annual Return 2006 rr_AnnualReturn2006 27.63%
Annual Return 2007 rr_AnnualReturn2007 7.29%
Annual Return 2008 rr_AnnualReturn2008 (45.85%)
Annual Return 2009 rr_AnnualReturn2009 26.39%
Annual Return 2010 rr_AnnualReturn2010 7.42%
Annual Return 2011 rr_AnnualReturn2011 (13.52%)
Annual Return 2012 rr_AnnualReturn2012 21.80%
Annual Return 2013 rr_AnnualReturn2013 22.63%
Annual Return 2014 rr_AnnualReturn2014 (9.29%)
Annual Return 2015 rr_AnnualReturn2015 (1.71%)
1 Year rr_AverageAnnualReturnYear01 (1.71%)
5 Years rr_AverageAnnualReturnYear05 2.87%
10 Years rr_AverageAnnualReturnYear10 1.49%
Putnam VT International Value Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.69%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 1.13%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 115
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 359
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 622
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,375
1 Year rr_AverageAnnualReturnYear01 (2.00%)
5 Years rr_AverageAnnualReturnYear05 2.61%
10 Years rr_AverageAnnualReturnYear10 1.23%
Putnam VT International Value Fund | MSCI EAFE Value Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.68%)
5 Years rr_AverageAnnualReturnYear05 2.55%
10 Years rr_AverageAnnualReturnYear10 1.96%
Putnam VT International Growth Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT International Growth Fund seeks long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 04-30-2017
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 83%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 83.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund's operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of companies of any size in established and emerging markets outside the United States. We invest mainly in growth stocks, which are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -4.50%

Best calendar quarter
Q2 09 23.00%

Worst calendar quarter
Q3 11 -24.72%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (4.50%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 23.00%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (24.72%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT International Growth Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.92%
Other expenses rr_OtherExpensesOverAssets 0.37%
Total annual fund operating expenses rr_ExpensesOverAssets 1.29%
Expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total annual fund operating expenses after expenses reimbursement rr_NetExpensesOverAssets 1.20%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 122
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 400
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 699
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,549
Annual Return 2006 rr_AnnualReturn2006 26.42%
Annual Return 2007 rr_AnnualReturn2007 13.52%
Annual Return 2008 rr_AnnualReturn2008 (42.37%)
Annual Return 2009 rr_AnnualReturn2009 38.76%
Annual Return 2010 rr_AnnualReturn2010 12.49%
Annual Return 2011 rr_AnnualReturn2011 (17.65%)
Annual Return 2012 rr_AnnualReturn2012 21.24%
Annual Return 2013 rr_AnnualReturn2013 22.70%
Annual Return 2014 rr_AnnualReturn2014 (5.90%)
Annual Return 2015 rr_AnnualReturn2015 1.33%
1 Year rr_AverageAnnualReturnYear01 1.33%
5 Years rr_AverageAnnualReturnYear05 3.16%
10 Years rr_AverageAnnualReturnYear10 4.19%
Putnam VT International Growth Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.92%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.37%
Total annual fund operating expenses rr_ExpensesOverAssets 1.54%
Expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total annual fund operating expenses after expenses reimbursement rr_NetExpensesOverAssets 1.45%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 148
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 478
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 831
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,827
1 Year rr_AverageAnnualReturnYear01 1.12%
5 Years rr_AverageAnnualReturnYear05 2.90%
10 Years rr_AverageAnnualReturnYear10 3.94%
Putnam VT International Growth Fund | MSCI EAFE Growth Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.09%
5 Years rr_AverageAnnualReturnYear05 4.60%
10 Years rr_AverageAnnualReturnYear10 4.03%
Putnam VT Investors Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Investors Fund seeks long-term growth of capital and any increased income that results from this growth.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 47%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 47.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -1.21%

Best calendar quarter
Q2 09 18.61%

Worst calendar quarter
Q4 08 -21.46%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.21%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.61%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.46%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Investors Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Other expenses rr_OtherExpensesOverAssets 0.14%
Total annual fund operating expenses rr_ExpensesOverAssets 0.69%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 221
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 384
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 859
Annual Return 2006 rr_AnnualReturn2006 14.24%
Annual Return 2007 rr_AnnualReturn2007 (4.90%)
Annual Return 2008 rr_AnnualReturn2008 (39.44%)
Annual Return 2009 rr_AnnualReturn2009 31.18%
Annual Return 2010 rr_AnnualReturn2010 14.24%
Annual Return 2011 rr_AnnualReturn2011 0.29%
Annual Return 2012 rr_AnnualReturn2012 17.06%
Annual Return 2013 rr_AnnualReturn2013 35.52%
Annual Return 2014 rr_AnnualReturn2014 14.25%
Annual Return 2015 rr_AnnualReturn2015 (1.96%)
1 Year rr_AverageAnnualReturnYear01 (1.96%)
5 Years rr_AverageAnnualReturnYear05 12.25%
10 Years rr_AverageAnnualReturnYear10 5.80%
Putnam VT Investors Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.14%
Total annual fund operating expenses rr_ExpensesOverAssets 0.94%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 300
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 520
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,155
1 Year rr_AverageAnnualReturnYear01 (2.18%)
5 Years rr_AverageAnnualReturnYear05 11.97%
10 Years rr_AverageAnnualReturnYear10 5.53%
Putnam VT Investors Fund | S&P 500 Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.38%
5 Years rr_AverageAnnualReturnYear05 12.57%
10 Years rr_AverageAnnualReturnYear10 7.31%
Putnam VT Multi-Cap Value Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Multi-Cap Value Fund seeks capital appreciation and,
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock as a secondary objective, current income.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 82%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 82.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of U.S. companies of any size, with a focus on value stocks. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. However, prior to becoming Putnam VT Multi- Cap Value Fund on September 1, 2010, the fund (as Putnam VT Mid-Cap Value Fund) invested at least 80% of its net assets in midsize companies, and the performance information below may have differed if the fund had instead pursued a multi-cap value investment strategy during the time periods presented. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 2.37%

Best calendar quarter
Q2 09 24.85%

Worst calendar quarter
Q4 08 -26.41%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 2.37%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 24.85%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn 26.41%
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Multi-Cap Value Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Other expenses rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 0.77%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 79
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 246
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 428
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 954
Annual Return 2006 rr_AnnualReturn2006 15.32%
Annual Return 2007 rr_AnnualReturn2007 1.98%
Annual Return 2008 rr_AnnualReturn2008 (42.77%)
Annual Return 2009 rr_AnnualReturn2009 39.54%
Annual Return 2010 rr_AnnualReturn2010 24.32%
Annual Return 2011 rr_AnnualReturn2011 (4.87%)
Annual Return 2012 rr_AnnualReturn2012 16.50%
Annual Return 2013 rr_AnnualReturn2013 42.43%
Annual Return 2014 rr_AnnualReturn2014 11.08%
Annual Return 2015 rr_AnnualReturn2015 (4.06%)
1 Year rr_AverageAnnualReturnYear01 (4.06%)
5 Years rr_AverageAnnualReturnYear05 10.96%
10 Years rr_AverageAnnualReturnYear10 6.99%
Putnam VT Multi-Cap Value Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 1.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 104
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 325
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 563
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,248
1 Year rr_AverageAnnualReturnYear01 (4.27%)
5 Years rr_AverageAnnualReturnYear05 10.69%
10 Years rr_AverageAnnualReturnYear10 6.72%
Putnam VT Multi-Cap Value Fund | Russell 3000 Value Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.13%)
5 Years rr_AverageAnnualReturnYear05 10.98%
10 Years rr_AverageAnnualReturnYear10 6.11%
Putnam VT Government Money Market Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Government Money Market Fund seeks as high a rate of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital and maintenance of liquidity.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest at least 99.5 percent of the fund’s total assets in cash, U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities or cash. We invest mainly in debt securities that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bills) or by the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds). The U.S. government securities in which we invest may also include variable and floating rate instruments and when-issued and delayed delivery securities (i.e., payment or delivery of the securities occurs at a future date for a predetermined price). Under normal circumstances, we invest at least 80% of the fund’s net assets in U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities. This policy may be changed only after 60 days’ notice to shareholders. The securities purchased by the fund are subject to quality, maturity, diversification and other requirements pursuant to rules promulgated by the Securities and Exchange Commission. We may consider, among other factors, credit and interest rate risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, there is no guarantee that the fund will be able to do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The fund’s sponsor has no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time.

The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund’s investments). Although the fund only buys high quality investments, investments backed by a letter of credit carry the risk that the provider of the letter of credit will not be able to fulfill its obligations to the issuer. Changes in the financial condition of an issuer or counterparty, changes in specific economic or political conditions that affect a particular type of issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security’s or instrument’s credit quality or value. Certain securities in which the fund may invest, including securities issued by certain U.S. government agencies and U.S. government sponsored enterprises, are not guaranteed by the U.S. government or supported by the full faith and credit of the United States. Mortgage-backed investments carry the risk that they may increase in value less when interest rates decline and decline in value more when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields.

The fund may not achieve its goal and is not intended to be a complete investment program.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money by investing in the fund.
Risk Money Market Fund [Text] rr_RiskMoneyMarketFund The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund’s investments). Although the fund only buys high quality investments, investments backed by a letter of credit carry the risk that the provider of the letter of credit will not be able to fulfill its obligations to the issuer. Changes in the financial condition of an issuer or counterparty, changes in specific economic or political conditions that affect a particular type of issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security’s or instrument’s credit quality or value. Certain securities in which the fund may invest, including securities issued by certain U.S. government agencies and U.S. government sponsored enterprises, are not guaranteed by the U.S. government or supported by the full faith and credit of the United States. Mortgage-backed investments carry the risk that they may increase in value less when interest rates decline and decline in value more when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 0.00%

Best calendar quarter
Q3 07 1.27%

Worst calendar quarter
Q4 15 0.00%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2007
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.27%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2015
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Government Money Market Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.28%
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 0.43%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 44
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 138
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 241
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 542
Annual Return 2006 rr_AnnualReturn2006 4.66%
Annual Return 2007 rr_AnnualReturn2007 5.05%
Annual Return 2008 rr_AnnualReturn2008 2.83%
Annual Return 2009 rr_AnnualReturn2009 0.35%
Annual Return 2010 rr_AnnualReturn2010 0.04%
Annual Return 2011 rr_AnnualReturn2011 0.01%
Annual Return 2012 rr_AnnualReturn2012 0.01%
Annual Return 2013 rr_AnnualReturn2013 0.01%
Annual Return 2014 rr_AnnualReturn2014 0.01%
Annual Return 2015 rr_AnnualReturn2015 0.01%
1 Year rr_AverageAnnualReturnYear01 0.01%
5 Years rr_AverageAnnualReturnYear05 0.01%
10 Years rr_AverageAnnualReturnYear10 1.28%
Putnam VT Government Money Market Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.28%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 0.68%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 69
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 218
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 379
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 847
1 Year rr_AverageAnnualReturnYear01 0.01%
5 Years rr_AverageAnnualReturnYear05 0.01%
10 Years rr_AverageAnnualReturnYear10 1.19%
Putnam VT Government Money Market Fund | Lipper VP (Underlying Funds) - Money Markets Funds Category Average  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.03%)
5 Years rr_AverageAnnualReturnYear05 (0.02%)
10 Years rr_AverageAnnualReturnYear10 1.16%
Putnam VT Capital Opportunities Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Capital Opportunities Fund seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 21%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 21.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks (growth or value stocks or both) of small and midsize U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -0.46%

Best calendar quarter
Q2 09 24.01%

Worst calendar quarter
Q4 08 -24.85%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.46%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 24.01%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (24.85%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock As of April 1, 2016, the Russell 2000 Index (an unmanaged index of 2,000 small companies in the Russell 3000 Index) replaced the Russell 2500 Index (an unmanaged index of 2,500 small and midsize companies in the Russell 3000 Index) as the benchmark for this fund because, in Putnam Investment Management, LLC’s opinion, the securities tracked by this index more accurately reflect the types of securities that generally will be held by the fund. The average annual total returns of the Russell 2500 Index for the one-, five-, and ten-year periods ended on December 31, 2015 were –2.90%, 10.32%, and 7.56%, respectively.
Putnam VT Capital Opportunities Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Other expenses rr_OtherExpensesOverAssets 0.27%
Total annual fund operating expenses rr_ExpensesOverAssets 0.89%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 91
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 284
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 493
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,096
Annual Return 2006 rr_AnnualReturn2006 15.52%
Annual Return 2007 rr_AnnualReturn2007 (9.29%)
Annual Return 2008 rr_AnnualReturn2008 (35.01%)
Annual Return 2009 rr_AnnualReturn2009 45.98%
Annual Return 2010 rr_AnnualReturn2010 29.83%
Annual Return 2011 rr_AnnualReturn2011 (5.88%)
Annual Return 2012 rr_AnnualReturn2012 14.69%
Annual Return 2013 rr_AnnualReturn2013 34.33%
Annual Return 2014 rr_AnnualReturn2014 7.36%
Annual Return 2015 rr_AnnualReturn2015 (7.37%)
1 Year rr_AverageAnnualReturnYear01 (7.37%)
5 Years rr_AverageAnnualReturnYear05 7.59%
10 Years rr_AverageAnnualReturnYear10 6.41%
Putnam VT Capital Opportunities Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.27%
Total annual fund operating expenses rr_ExpensesOverAssets 1.14%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 116
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 362
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 628
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,386
1 Year rr_AverageAnnualReturnYear01 (7.61%)
5 Years rr_AverageAnnualReturnYear05 7.33%
10 Years rr_AverageAnnualReturnYear10 6.14%
Putnam VT Capital Opportunities Fund | Russell 2000 Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.41%)
5 Years rr_AverageAnnualReturnYear05 9.19%
10 Years rr_AverageAnnualReturnYear10 6.80%
Putnam VT Multi-Cap Growth Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Multi-Cap Growth Fund seeks long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 66%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 66.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of U.S. companies of any size, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -1.77%

Best calendar quarter
Q1 12 18.06%

Worst calendar quarter
Q4 08 -22.18%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.77%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.06%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (22.18%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Multi-Cap Growth Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.66%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 67
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 211
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 368
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 822
Annual Return 2006 rr_AnnualReturn2006 8.82%
Annual Return 2007 rr_AnnualReturn2007 6.02%
Annual Return 2008 rr_AnnualReturn2008 (38.62%)
Annual Return 2009 rr_AnnualReturn2009 32.48%
Annual Return 2010 rr_AnnualReturn2010 19.87%
Annual Return 2011 rr_AnnualReturn2011 (4.88%)
Annual Return 2012 rr_AnnualReturn2012 17.09%
Annual Return 2013 rr_AnnualReturn2013 36.74%
Annual Return 2014 rr_AnnualReturn2014 13.80%
Annual Return 2015 rr_AnnualReturn2015 (0.07%)
1 Year rr_AverageAnnualReturnYear01 (0.07%)
5 Years rr_AverageAnnualReturnYear05 11.61%
10 Years rr_AverageAnnualReturnYear10 6.90%
Putnam VT Multi-Cap Growth Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 93
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 290
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 504
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,120
1 Year rr_AverageAnnualReturnYear01 (0.29%)
5 Years rr_AverageAnnualReturnYear05 11.34%
10 Years rr_AverageAnnualReturnYear10 6.63%
Putnam VT Multi-Cap Growth Fund | Russell 3000 Growth Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.09%
5 Years rr_AverageAnnualReturnYear05 13.30%
10 Years rr_AverageAnnualReturnYear10 8.49%
Putnam VT Research Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Research Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 90%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 90.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -0.47%

Best calendar quarter
Q2 09 18.46%

Worst calendar quarter
Q4 08 -24.03%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.47%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.46%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (24.03%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Research Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Other expenses rr_OtherExpensesOverAssets 0.26%
Total annual fund operating expenses rr_ExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 259
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 450
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,002
Annual Return 2006 rr_AnnualReturn2006 11.63%
Annual Return 2007 rr_AnnualReturn2007 0.83%
Annual Return 2008 rr_AnnualReturn2008 (38.42%)
Annual Return 2009 rr_AnnualReturn2009 33.54%
Annual Return 2010 rr_AnnualReturn2010 16.61%
Annual Return 2011 rr_AnnualReturn2011 (1.41%)
Annual Return 2012 rr_AnnualReturn2012 18.28%
Annual Return 2013 rr_AnnualReturn2013 33.60%
Annual Return 2014 rr_AnnualReturn2014 15.17%
Annual Return 2015 rr_AnnualReturn2015 (1.29%)
1 Year rr_AverageAnnualReturnYear01 (1.29%)
5 Years rr_AverageAnnualReturnYear05 12.11%
10 Years rr_AverageAnnualReturnYear10 6.69%
Putnam VT Research Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.26%
Total annual fund operating expenses rr_ExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 108
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 337
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 585
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,294
1 Year rr_AverageAnnualReturnYear01 (1.50%)
5 Years rr_AverageAnnualReturnYear05 11.82%
10 Years rr_AverageAnnualReturnYear10 6.43%
Putnam VT Research Fund | S&P 500 Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.38%
5 Years rr_AverageAnnualReturnYear05 12.57%
10 Years rr_AverageAnnualReturnYear10 7.31%
Putnam VT Small Cap Value Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Small Cap Value Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 52%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 52.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of small U.S. companies, with a focus on value stocks. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. Under normal circumstances, we invest at least 80% of the fund’s net assets in companies of a size similar to those in the Russell 2000 Value Index. This policy may be changed only after 60 days’ notice to shareholders. As of March 31, 2016, the index was composed of companies having market capitalizations of between approximately $13.8 million and $5.9 billion. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -1.14%

Best calendar quarter
Q2 09 25.25%

Worst calendar quarter
Q4 08 -28.70%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.14%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 25.25%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (28.70%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Small Cap Value Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Other expenses rr_OtherExpensesOverAssets 0.14%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.26%
Total annual fund operating expenses rr_ExpensesOverAssets 1.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 104
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 325
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 563
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,248
Annual Return 2006 rr_AnnualReturn2006 17.58%
Annual Return 2007 rr_AnnualReturn2007 (12.43%)
Annual Return 2008 rr_AnnualReturn2008 (39.26%)
Annual Return 2009 rr_AnnualReturn2009 31.84%
Annual Return 2010 rr_AnnualReturn2010 26.30%
Annual Return 2011 rr_AnnualReturn2011 (4.54%)
Annual Return 2012 rr_AnnualReturn2012 17.79%
Annual Return 2013 rr_AnnualReturn2013 39.93%
Annual Return 2014 rr_AnnualReturn2014 3.69%
Annual Return 2015 rr_AnnualReturn2015 (3.90%)
1 Year rr_AverageAnnualReturnYear01 (3.90%)
5 Years rr_AverageAnnualReturnYear05 9.41%
10 Years rr_AverageAnnualReturnYear10 5.02%
Putnam VT Small Cap Value Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.14%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.26%
Total annual fund operating expenses rr_ExpensesOverAssets 1.27%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 129
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 403
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 697
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,534
1 Year rr_AverageAnnualReturnYear01 (4.24%)
5 Years rr_AverageAnnualReturnYear05 9.13%
10 Years rr_AverageAnnualReturnYear10 4.76%
Putnam VT Small Cap Value Fund | Russell 2000 Value Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (7.47%)
5 Years rr_AverageAnnualReturnYear05 7.67%
10 Years rr_AverageAnnualReturnYear10 5.57%
Putnam VT Global Utilities Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Global Utilities Fund seeks capital growth and current income.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 17%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 17.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock For this non-diversified fund concentrating in the utilities industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in securities of companies worldwide in the utilities industries. This policy may be changed only after 60 days’ notice to shareholders. Potential investments include electric, gas or water utilities and companies that operate as independent producers and/or distributors of power. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration For this non-diversified fund concentrating in the utilities industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The utilities industries may be affected by increases in fuel costs, technological obsolescence, changes in regulatory policies and deregulation. Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Our policy of concentrating on a limited group of industries and the fund’s “non-diversified” status, which means the fund may invest a greater percentage of its assets in fewer issuers than a “diversified fund,” can increase the fund’s vulnerability to adverse developments affecting a single industry or issuer, which may result in greater losses and volatility for the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 9.40%

Best calendar quarter
Q2 09 14.09%

Worst calendar quarter
Q3 08 -19.64%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 9.40%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.09%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.64%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Global Utilities Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 259
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 450
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,002
Annual Return 2006 rr_AnnualReturn2006 27.40%
Annual Return 2007 rr_AnnualReturn2007 20.25%
Annual Return 2008 rr_AnnualReturn2008 (30.33%)
Annual Return 2009 rr_AnnualReturn2009 7.66%
Annual Return 2010 rr_AnnualReturn2010 2.10%
Annual Return 2011 rr_AnnualReturn2011 (5.19%)
Annual Return 2012 rr_AnnualReturn2012 5.35%
Annual Return 2013 rr_AnnualReturn2013 14.02%
Annual Return 2014 rr_AnnualReturn2014 14.88%
Annual Return 2015 rr_AnnualReturn2015 (9.65%)
1 Year rr_AverageAnnualReturnYear01 (9.65%)
5 Years rr_AverageAnnualReturnYear05 3.40%
10 Years rr_AverageAnnualReturnYear10 3.33%
Putnam VT Global Utilities Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.62%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 108
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 337
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 585
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,294
1 Year rr_AverageAnnualReturnYear01 (9.91%)
5 Years rr_AverageAnnualReturnYear05 3.14%
10 Years rr_AverageAnnualReturnYear10 3.06%
Putnam VT Global Utilities Fund | MSCI World Utilities Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (6.61%)
5 Years rr_AverageAnnualReturnYear05 3.61%
10 Years rr_AverageAnnualReturnYear10 3.88%
Putnam VT Voyager Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Voyager Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 146%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 146.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of midsize and large U.S. companies, with a focus on growth stocks. Growth stocks are issued by companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small and midsize companies.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -4.15%

Best calendar quarter
Q2 09 28.30%

Worst calendar quarter
Q3 11 -24.00%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (4.15%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 28.30%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (24.00%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Voyager Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Other expenses rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 0.68%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 69
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 218
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 379
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 847
Annual Return 2006 rr_AnnualReturn2006 5.70%
Annual Return 2007 rr_AnnualReturn2007 5.79%
Annual Return 2008 rr_AnnualReturn2008 (36.87%)
Annual Return 2009 rr_AnnualReturn2009 64.30%
Annual Return 2010 rr_AnnualReturn2010 21.08%
Annual Return 2011 rr_AnnualReturn2011 (17.64%)
Annual Return 2012 rr_AnnualReturn2012 14.51%
Annual Return 2013 rr_AnnualReturn2013 44.10%
Annual Return 2014 rr_AnnualReturn2014 9.99%
Annual Return 2015 rr_AnnualReturn2015 (5.88%)
1 Year rr_AverageAnnualReturnYear01 (5.88%)
5 Years rr_AverageAnnualReturnYear05 7.06%
10 Years rr_AverageAnnualReturnYear10 7.04%
Putnam VT Voyager Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.55%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 0.93%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 95
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 296
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 515
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,143
1 Year rr_AverageAnnualReturnYear01 (6.11%)
5 Years rr_AverageAnnualReturnYear05 6.80%
10 Years rr_AverageAnnualReturnYear10 6.78%
Putnam VT Voyager Fund | Russell 1000 Growth Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.67%
5 Years rr_AverageAnnualReturnYear05 13.53%
10 Years rr_AverageAnnualReturnYear10 8.53%
Putnam VT Diversified Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Diversified Income Fund seeks as high a level of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 876%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 876.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in bonds that are securitized debt instruments (such as mortgage-backed investments) and other obligations of companies and governments worldwide, are either investment-grade or below-investment-grade in quality (sometimes referred to as “junk bonds”) and have intermediate- to long-term maturities (three years or longer).

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, such as futures, options, certain foreign currency transactions and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund’s investments). Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.


The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -4.01%

Best calendar quarter
Q2 09 18.40%

Worst calendar quarter
Q4 08 -21.54%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (4.01%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.40%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.54%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Diversified Income Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.54%
Other expenses rr_OtherExpensesOverAssets 0.21%
Total annual fund operating expenses rr_ExpensesOverAssets 0.75%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 77
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 240
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 417
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 930
Annual Return 2006 rr_AnnualReturn2006 6.60%
Annual Return 2007 rr_AnnualReturn2007 4.31%
Annual Return 2008 rr_AnnualReturn2008 (31.07%)
Annual Return 2009 rr_AnnualReturn2009 54.83%
Annual Return 2010 rr_AnnualReturn2010 13.02%
Annual Return 2011 rr_AnnualReturn2011 (3.17%)
Annual Return 2012 rr_AnnualReturn2012 11.97%
Annual Return 2013 rr_AnnualReturn2013 8.08%
Annual Return 2014 rr_AnnualReturn2014 0.68%
Annual Return 2015 rr_AnnualReturn2015 (2.32%)
1 Year rr_AverageAnnualReturnYear01 (2.32%)
5 Years rr_AverageAnnualReturnYear05 2.88%
10 Years rr_AverageAnnualReturnYear10 4.45%
Putnam VT Diversified Income Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.54%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.21%
Total annual fund operating expenses rr_ExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 318
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 552
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,225
1 Year rr_AverageAnnualReturnYear01 (2.34%)
5 Years rr_AverageAnnualReturnYear05 2.65%
10 Years rr_AverageAnnualReturnYear10 4.34%
Putnam VT Diversified Income Fund | Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.55%
5 Years rr_AverageAnnualReturnYear05 3.25%
10 Years rr_AverageAnnualReturnYear10 4.51%
Putnam VT Diversified Income Fund | Citigroup Non-U.S. World Government Bond Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.54%)
5 Years rr_AverageAnnualReturnYear05 (1.30%)
10 Years rr_AverageAnnualReturnYear10 3.05%
Putnam VT Diversified Income Fund | JPMorgan Developed High Yield Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.53%)
5 Years rr_AverageAnnualReturnYear05 5.45%
10 Years rr_AverageAnnualReturnYear10 7.14%
Putnam VT Equity Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Equity Income Fund seeks capital growth and current income.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 22%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of midsize and large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Under normal circumstances, we invest at least 80% of the fund’s net assets in common stocks and other equity investments that offer the potential for current income. This policy may be changed only after 60 days’ notice to shareholders. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 0.41%

Best calendar quarter
Q2 09 18.31%

Worst calendar quarter
Q4 08 -18.93%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.41%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.31%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.93%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Equity Income Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.47%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.58%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 59
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 186
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 324
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 726
Annual Return 2006 rr_AnnualReturn2006 19.15%
Annual Return 2007 rr_AnnualReturn2007 3.46%
Annual Return 2008 rr_AnnualReturn2008 (31.02%)
Annual Return 2009 rr_AnnualReturn2009 27.81%
Annual Return 2010 rr_AnnualReturn2010 12.92%
Annual Return 2011 rr_AnnualReturn2011 2.07%
Annual Return 2012 rr_AnnualReturn2012 19.62%
Annual Return 2013 rr_AnnualReturn2013 32.72%
Annual Return 2014 rr_AnnualReturn2014 12.97%
Annual Return 2015 rr_AnnualReturn2015 (2.79%)
1 Year rr_AverageAnnualReturnYear01 (2.79%)
5 Years rr_AverageAnnualReturnYear05 12.22%
10 Years rr_AverageAnnualReturnYear10 8.13%
Putnam VT Equity Income Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.47%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.83%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 265
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 460
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,025
1 Year rr_AverageAnnualReturnYear01 (3.04%)
5 Years rr_AverageAnnualReturnYear05 11.95%
10 Years rr_AverageAnnualReturnYear10 7.87%
Putnam VT Equity Income Fund | Russell 1000 Value Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (3.83%)
5 Years rr_AverageAnnualReturnYear05 11.27%
10 Years rr_AverageAnnualReturnYear10 6.16%
Putnam VT George Putnam Balanced Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT George Putnam Balanced Fund seeks to provide a balanced investment composed of a well-diversified portfolio of stocks and bonds which produce both capital growth and current income.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 223%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 223.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in a combination of bonds and common stocks (growth or value stocks or both) of large U.S. companies, with a greater focus on common stocks. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We buy bonds of governments and private companies that are mostly investment-grade in quality with intermediate- to long-term maturities (three years or longer). We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”) which may be considered speculative.

Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The fund's performance is also compared to the S&P 500 Index, an unmanaged index of large U. S. company stocks. In addition, the fund’s performance is compared to the George Putnam Blended Index, an unmanaged index administered by Putnam Management, 60% of which is the S&P 500 Index and 40% of which is the Barclays U.S. Aggregate Bond Index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 0.51%

Best calendar quarter
Q2 09 13.04%

Worst calendar quarter
Q4 08 -27.53%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.51%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.04%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (27.53%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock The fund's performance is compared to the Barclays U.S. Aggregate Bond Index, an unmanaged index of U.S. investment-grade fixed income securities. The fund's performance is also compared to the S&P 500 Index, an unmanaged index of large U. S. company stocks. In addition, the fund’s performance is compared to the George Putnam Blended Index, an unmanaged index administered by Putnam Management, 60% of which is the S&P 500 Index and 40% of which is the Barclays U.S. Aggregate Bond Index.
Putnam VT George Putnam Balanced Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.52%
Other expenses rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 0.72%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 74
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 230
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 401
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 894
Annual Return 2006 rr_AnnualReturn2006 12.23%
Annual Return 2007 rr_AnnualReturn2007 1.14%
Annual Return 2008 rr_AnnualReturn2008 (40.57%)
Annual Return 2009 rr_AnnualReturn2009 26.10%
Annual Return 2010 rr_AnnualReturn2010 11.20%
Annual Return 2011 rr_AnnualReturn2011 2.88%
Annual Return 2012 rr_AnnualReturn2012 12.77%
Annual Return 2013 rr_AnnualReturn2013 18.46%
Annual Return 2014 rr_AnnualReturn2014 10.93%
Annual Return 2015 rr_AnnualReturn2015 (0.96%)
1 Year rr_AverageAnnualReturnYear01 (0.96%)
5 Years rr_AverageAnnualReturnYear05 8.59%
10 Years rr_AverageAnnualReturnYear10 3.63%
Putnam VT George Putnam Balanced Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.52%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 0.97%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 99
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 309
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 536
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,190
1 Year rr_AverageAnnualReturnYear01 (1.23%)
5 Years rr_AverageAnnualReturnYear05 8.35%
10 Years rr_AverageAnnualReturnYear10 3.37%
Putnam VT George Putnam Balanced Fund | S&P 500 Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.38%
5 Years rr_AverageAnnualReturnYear05 12.57%
10 Years rr_AverageAnnualReturnYear10 7.31%
Putnam VT George Putnam Balanced Fund | Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.55%
5 Years rr_AverageAnnualReturnYear05 3.25%
10 Years rr_AverageAnnualReturnYear10 4.51%
Putnam VT George Putnam Balanced Fund | George Putnam Blended Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.40%
5 Years rr_AverageAnnualReturnYear05 9.12%
10 Years rr_AverageAnnualReturnYear10 6.81%
Putnam VT Global Asset Allocation Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Global Asset Allocation Fund seeks long-term return consistent with preservation of capital.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 339%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 339.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest a majority of the fund’s assets in a diversified portfolio of equity securities (growth or value stocks or both) of both U.S. and foreign companies of any size. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We also invest in a diversified portfolio of fixed-income investments, including both U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments.

We may also select other investments that do not fall within these asset classes. We may also use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

Our allocation of assets among asset classes may hurt performance. The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”), which may be considered speculative. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-and asset-backed investments, in other investments with less attractive terms and yields.

The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex Putnam Balanced Blended Benchmark is an unmanaged index administered by Putnam Investment Management, LLC, 50% of which is the Russell 3000 Index, 35% of which is the Barclays U.S. Aggregate Bond Index, 10% of which is the MSCI/EAFE Index (ND) and 5% of which is the JPMorgan Developed High Yield Index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -0.32%

Best calendar quarter
Q2 09 16.12%

Worst calendar quarter
Q4 08 -19.54%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.32%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.12%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.54%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Putnam Balanced Blended Benchmark is an unmanaged index administered by Putnam Investment Management, LLC, 50% of which is the Russell 3000 Index, 35% of which is the Barclays U.S. Aggregate Bond Index, 10% of which is the MSCI/EAFE Index (ND) and 5% of which is the JPMorgan Developed High Yield Index.
Putnam VT Global Asset Allocation Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.59%
Other expenses rr_OtherExpensesOverAssets 0.28%
Total annual fund operating expenses rr_ExpensesOverAssets 0.87%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 89
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 278
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 482
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,073
Annual Return 2006 rr_AnnualReturn2006 13.04%
Annual Return 2007 rr_AnnualReturn2007 3.16%
Annual Return 2008 rr_AnnualReturn2008 (33.16%)
Annual Return 2009 rr_AnnualReturn2009 35.36%
Annual Return 2010 rr_AnnualReturn2010 14.94%
Annual Return 2011 rr_AnnualReturn2011 (0.18%)
Annual Return 2012 rr_AnnualReturn2012 14.58%
Annual Return 2013 rr_AnnualReturn2013 19.78%
Annual Return 2014 rr_AnnualReturn2014 9.66%
Annual Return 2015 rr_AnnualReturn2015 0.42%
1 Year rr_AverageAnnualReturnYear01 0.42%
5 Years rr_AverageAnnualReturnYear05 8.57%
10 Years rr_AverageAnnualReturnYear10 6.23%
Putnam VT Global Asset Allocation Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.59%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.28%
Total annual fund operating expenses rr_ExpensesOverAssets 1.12%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 114
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 356
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 617
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,363
1 Year rr_AverageAnnualReturnYear01 0.17%
5 Years rr_AverageAnnualReturnYear05 8.29%
10 Years rr_AverageAnnualReturnYear10 5.99%
Putnam VT Global Asset Allocation Fund | Russell 3000 Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.48%
5 Years rr_AverageAnnualReturnYear05 12.18%
10 Years rr_AverageAnnualReturnYear10 7.35%
Putnam VT Global Asset Allocation Fund | Putnam Balanced Blended Benchmark (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.35%
5 Years rr_AverageAnnualReturnYear05 8.00%
10 Years rr_AverageAnnualReturnYear10 6.25%
Putnam VT Global Equity Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Global Equity Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 56%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 56.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments. This policy may be changed only after 60 days’ notice to shareholders. We may also consider other factors that we believe will cause the stock price to rise.

We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be or become illiquid. Our use of derivatives may increase these risks by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -3.76%

Best calendar quarter
Q2 09 22.27%

Worst calendar quarter
Q4 08 -23.60%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (3.76%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.27%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (23.60%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Global Equity Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.69%
Other expenses rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 0.86%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 88
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 274
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 477
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,061
Annual Return 2006 rr_AnnualReturn2006 23.50%
Annual Return 2007 rr_AnnualReturn2007 9.37%
Annual Return 2008 rr_AnnualReturn2008 (45.24%)
Annual Return 2009 rr_AnnualReturn2009 30.16%
Annual Return 2010 rr_AnnualReturn2010 10.22%
Annual Return 2011 rr_AnnualReturn2011 (4.78%)
Annual Return 2012 rr_AnnualReturn2012 20.55%
Annual Return 2013 rr_AnnualReturn2013 32.27%
Annual Return 2014 rr_AnnualReturn2014 1.77%
Annual Return 2015 rr_AnnualReturn2015 (1.49%)
1 Year rr_AverageAnnualReturnYear01 (1.49%)
5 Years rr_AverageAnnualReturnYear05 8.77%
10 Years rr_AverageAnnualReturnYear10 4.91%
Putnam VT Global Equity Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.69%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.11%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 113
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 353
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 612
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,352
1 Year rr_AverageAnnualReturnYear01 (1.71%)
5 Years rr_AverageAnnualReturnYear05 8.50%
10 Years rr_AverageAnnualReturnYear10 4.65%
Putnam VT Global Equity Fund | MSCI World Index (ND) (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.87%)
5 Years rr_AverageAnnualReturnYear05 7.59%
10 Years rr_AverageAnnualReturnYear10 4.98%
Putnam VT Growth and Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Growth and Income Fund seeks capital growth and current income.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 36%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 36.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock We invest mainly in common stocks of large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

The value of stocks in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -1.05%

Best calendar quarter
Q2 09 19.55%

Worst calendar quarter
Q4 08 -21.39%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.05%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 19.55%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.39%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Putnam VT Growth and Income Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.47%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.58%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 59
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 186
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 324
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 726
Annual Return 2006 rr_AnnualReturn2006 16.19%
Annual Return 2007 rr_AnnualReturn2007 (5.79%)
Annual Return 2008 rr_AnnualReturn2008 (38.57%)
Annual Return 2009 rr_AnnualReturn2009 30.16%
Annual Return 2010 rr_AnnualReturn2010 14.71%
Annual Return 2011 rr_AnnualReturn2011 (4.44%)
Annual Return 2012 rr_AnnualReturn2012 19.43%
Annual Return 2013 rr_AnnualReturn2013 36.01%
Annual Return 2014 rr_AnnualReturn2014 11.04%
Annual Return 2015 rr_AnnualReturn2015 (7.36%)
1 Year rr_AverageAnnualReturnYear01 (7.36%)
5 Years rr_AverageAnnualReturnYear05 9.81%
10 Years rr_AverageAnnualReturnYear10 4.83%
Putnam VT Growth and Income Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.47%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.83%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 265
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 460
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,025
1 Year rr_AverageAnnualReturnYear01 (7.57%)
5 Years rr_AverageAnnualReturnYear05 9.55%
10 Years rr_AverageAnnualReturnYear10 4.57%
Putnam VT Growth and Income Fund | Russell 1000 Value Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (3.83%)
5 Years rr_AverageAnnualReturnYear05 11.27%
10 Years rr_AverageAnnualReturnYear10 6.16%
Putnam VT Absolute Return 500 Fund Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund summary
Objective [Heading] rr_ObjectiveHeading Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Putnam VT Absolute Return 500 Fund seeks to earn a positive total return that exceeds the return on U.S. Treasury bills by 500 basis points (or 5.00%) on an annualized basis over a reasonable period of time (generally at least three years or more) regardless of market conditions.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 04-30-2017
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 520%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 520.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Strategy [Heading] rr_StrategyHeading Investments
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The fund is designed to pursue a consistent absolute return by combining two independent investment strategies — a beta strategy, which provides broad exposure to investment markets, and an alpha strategy, which seeks returns from active trading. The beta strategy seeks to balance risk and to provide positive total return by investing, without limit, in many different asset classes, including U.S., international, and emerging markets equity securities (growth or value stocks or both) and fixed-income securities; mortgage- and asset-backed securities; below-investment-grade securities (sometimes referred to as “junk bonds”); inflation-protected securities; commodities; and real estate investment trusts (REITs). The alpha strategy involves the potential use of active trading strategies designed to provide additional total return through active security selection, tactical asset allocation, currency transactions and options transactions. In pursuing a consistent absolute return, the fund’s strategies are also generally intended to produce lower volatility over a reasonable period of time than has been historically associated with traditional asset classes that have earned similar levels of return over long historical periods. These traditional asset classes might include, for example, balanced portfolios with significant exposure to both stocks and bonds.

We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks when deciding whether to buy or sell fixed-income investments. We may also take into account general market conditions when making investment decisions. We typically use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, to a significant extent for hedging purposes and to increase the fund’s exposure to the asset classes and strategies mentioned above, which may create investment leverage.

Risk [Heading] rr_RiskHeading Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock It is important to understand that you can lose money by investing in the fund.

Our allocation of assets among asset classes may hurt performance. The value of stocks and bonds in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general financial market conditions, changing market perceptions of the risk of default, changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These factors may also lead to periods of high volatility and reduced liquidity in the bond markets. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.

Bond investments are subject to interest rate risk, which means the value of the fund’s bond investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Default risk is generally higher for non-qualified mortgages. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which may be considered speculative. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields.

The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation) and may be or become illiquid. Our alpha strategy may lose money or not earn a return sufficient to cover associated trading and other costs. Our use of leverage obtained through derivatives increases these risks by increasing investment exposure. Derivatives also involve the risk, in the case of many over-the-counter instruments, of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations.

The fund may not achieve its goal, and it is not intended to be a complete investment program. The fund’s efforts to produce lower volatility returns may not be successful and may make it more difficult at times for the fund to achieve its targeted return. In addition, under certain market conditions, the fund may accept greater volatility than would typically be the case, in order to seek its targeted return. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Investor profile

The fund is designed for investors seeking positive total return in excess of the return on U.S. Treasury bills by a targeted amount (500 basis points) on an annualized basis over a reasonable period of time regardless of market conditions. Because the fund seeks performance over a reasonable period of time, investors should be willing to wait out short-term market fluctuations and should generally have an investment horizon of at least three years or more. The fund may be suitable for you if you are considering a balanced fund, or a fund that can manage allocations and risk across global asset classes.
Risk Lose Money [Text] rr_RiskLoseMoney It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Annual total returns for class IA shares
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The performance information does not reflect insurance-related charges or expenses. If it did, performance would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Year to date performance
through 3/31/16 -1.26%

Best calendar quarter
Q1 12 4.57%

Worst calendar quarter
Q2 13 -1.55%
Year to Date Return, Label rr_YearToDateReturnLabel Year to date performance through
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.26%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 4.57%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2013
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (1.55%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for periods ending 12/31/15)
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock The Barclays U.S. Aggregate Bond Index and the S&P 500 Index are broad measures of market performance. Securities in the fund do not match those in the indexes and the performance of the fund will differ.
Putnam VT Absolute Return 500 Fund Fund | Class IA  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.72%
Other expenses rr_OtherExpensesOverAssets 0.62%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total annual fund operating expenses rr_ExpensesOverAssets 1.36%
Expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [1]
Total annual fund operating expenses after expenses reimbursement rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 387
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 703
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,597
Annual Return 2012 rr_AnnualReturn2012 4.57%
Annual Return 2013 rr_AnnualReturn2013 4.46%
Annual Return 2014 rr_AnnualReturn2014 4.12%
Annual Return 2015 rr_AnnualReturn2015 (0.22%)
1 Year rr_AverageAnnualReturnYear01 (0.22%)
Since inception rr_AverageAnnualReturnSinceInception 1.92%
Inception Date rr_AverageAnnualReturnInceptionDate May 02, 2011
Putnam VT Absolute Return 500 Fund Fund | Class IB  
Risk Return Abstract rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.72%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.62%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total annual fund operating expenses rr_ExpensesOverAssets 1.61%
Expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [1]
Total annual fund operating expenses after expenses reimbursement rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 119
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 465
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 835
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,874
1 Year rr_AverageAnnualReturnYear01 (0.44%)
Since inception rr_AverageAnnualReturnSinceInception 1.65%
Inception Date rr_AverageAnnualReturnInceptionDate May 02, 2011
Putnam VT Absolute Return 500 Fund Fund | BofA Merrill Lynch U.S.Treasury Bill Index (no deduction for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.09%
Since inception rr_AverageAnnualReturnSinceInception 0.09%
Inception Date rr_AverageAnnualReturnInceptionDate May 02, 2011
Putnam VT Absolute Return 500 Fund Fund | BofA Merrill Lynch U.S. Treasury Bill Index plus 500 basis points  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.09%
Since inception rr_AverageAnnualReturnSinceInception 5.09%
Inception Date rr_AverageAnnualReturnInceptionDate May 02, 2011
Putnam VT Absolute Return 500 Fund Fund | S&P 500 Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.38%
Since inception rr_AverageAnnualReturnSinceInception 11.42%
Inception Date rr_AverageAnnualReturnInceptionDate May 02, 2011
Putnam VT Absolute Return 500 Fund Fund | Barclays U.S. Aggregate Bond Index (no deduction for fees or expenses)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.55%
Since inception rr_AverageAnnualReturnSinceInception 3.11%
Inception Date rr_AverageAnnualReturnInceptionDate May 02, 2011
[1] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through 4/30/17. This obligation may be modified or discontinued only with approval of the fund's Board of Trustees.
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