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Label Element Value
Value Portfolio | Value Portfolio  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading Value Portfolio
Objective [Heading] oef_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock
This Fund seeks long-term growth of capital.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Examples below. The table and Examples below also do not reflect expenses and charges that are imposed under your variable annuity contract or variable life insurance policy. For information on these expenses and charges, please refer to the applicable contract or policy prospectus. If these fees and expenses were included, the fees and expenses shown would be higher.
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination Apr. 30, 2026
Expense Example [Heading] oef_ExpenseExampleHeading Examples
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock
The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other Funds of the Trust or other mutual funds. The Examples assume that you invest $10,000 for the time periods indicated, that your investment has a 5% return each year and that the Fund’s annual operating expenses remain as stated in the previous table for the time periods shown except for the fee waiver, which is only reflected for the contractual period. Although your actual costs may be higher or lower, the Examples show what your costs would be based on these assumptions.
These Examples do not reflect fees and expenses of any variable annuity contract or variable life insurance policy. If these were included, the expenses (in dollars) shown would be higher. Keep in mind that this is only an estimate; actual expenses and performance may vary.
Expense Example by, Year, Caption [Text] oef_ExpenseExampleByYearCaption Your expenses (in dollars) if you buy, sell/redeem or hold all of your shares at the end of each period
Expense Example, No Redemption, By Year, Caption [Text] oef_ExpenseExampleNoRedemptionByYearCaption Your expenses (in dollars) if you buy, sell/redeem or hold all of your shares at the end of each period
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its holdings). During the
fiscal year ended December 31, 2024, the portfolio turnover rate was 140% of the average value of the Fund. A higher portfolio turnover rate reflects a greater number of securities being bought or sold, which may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Examples, affect the Fund’s performance.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 140.00%
Strategy [Heading] oef_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock
Under normal circumstances, this Fund invests at least 80% of its assets in common stock. The sub-adviser focuses primarily on large-capitalization companies, emphasizing a value style of investing. The sub-adviser generally considers a company to be a large-capitalization company if the company has a market capitalization within the range of companies included in the Russell 1000 Value Index, which measures the performance of the large-capitalization value segment of the U.S. equity universe. As of December 31, 2024, the market capitalization range of the Russell 1000 Value Index was approximately $351.6 million to $977.5 billion. As of December 31, 2024, the weighted average market capitalization of the Fund was approximately $260.4 billion.
The Fund may also invest in the equity securities of companies with medium market capitalizations (“mid-capitalization companies”).
In selecting investments for the Fund, the sub-adviser looks for companies whose stock price it believes may not adequately reflect the company’s value. The sub-adviser attempts to purchase the stocks of these undervalued companies and hold each stock until the price has increased to, or is higher than, a level the sub-adviser believes more accurately reflects the fair value of the company. The sub-adviser uses a variety of analytical research tools and techniques to help it make decisions about buying or holding securities of companies that meet its investment criteria and selling the securities of companies that do not.
The sub-adviser normally invests the Fund’s assets across different groups of industries/sectors, but may invest a significant percentage of the Fund’s assets in issuers in a single sector at its investment discretion in seeking the investment goal of the Fund. As of December 31, 2024, a significant portion of the Fund is represented by securities of companies in the Consumer Non-Cyclical sector.
The sub-adviser may sell stocks it believes no longer meets its valuation criteria.
The Fund may lend its portfolio holdings to certain financial institutions.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock
The bar chart and Average Annual Total Returns table below show performance information for the Fund and provide some indication of the risk of investing in the Fund by showing changes in the performance of the Fund from year to year and showing how the Fund’s average annual total returns compare to the returns of:
•
a broad-based domestic equity market index that represents the overall domestic equity market (the “Regulatory Index”) which the Fund has included to comply with regulatory requirements and thus may not necessarily represent the Fund’s principal investment strategies; and
​
•
a value domestic equity market index that the Investment Adviser considers to be representative of the value domestic equity markets and the Fund’s principal investment strategies. The Investment Adviser considers this index to be the appropriate benchmark index for the Fund for performance comparison.
​
The bar chart shows the performance of the Fund’s Class I shares. Returns do not reflect fees and expenses of any variable annuity contract or variable life insurance policy; if these fees and expenses were included, the returns shown would be lower. Past performance is not necessarily an indication of how the Fund will perform in the future. Performance reflects fee waivers or expense limitations, if any, that were in effect during the periods presented.
Putnam Investment Management, LLC began managing the Fund on November 1, 2024 and some investment policies changed at that time. Other firms managed the Fund before that date.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and Average Annual Total Returns table below show performance information for the Fund and provide some indication of the risk of investing in the Fund by showing changes in the performance of the Fund from year to year and showing how the Fund’s average annual total returns compare to the returns of:•a broad-based domestic equity market index that represents the overall domestic equity market (the “Regulatory Index”) which the Fund has included to comply with regulatory requirements and thus may not necessarily represent the Fund’s principal investment strategies; and•a value domestic equity market index that the Investment Adviser considers to be representative of the value domestic equity markets and the Fund’s principal investment strategies. The Investment Adviser considers this index to be the appropriate benchmark index for the Fund for performance comparison.
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Past performance is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] oef_BarChartHeading Calendar Year Total Returns (%)
Bar Chart Does Not Reflect Sales Loads [Text] oef_BarChartDoesNotReflectSalesLoads Returns do not reflect fees and expenses of any variable annuity contract or variable life insurance policy; if these fees and expenses were included, the returns shown would be lower.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock
Best and worst quarterly performance reflected within the bar chart: Q2 2020: 17.06%; Q1 2020: (31.95%)
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best quarterly performance reflected within the bar chart:
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 17.06%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel worst quarterly performance reflected within the bar chart:
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (31.95%)
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses, or taxes)
Average Annual Return, Caption [Optional Text] oef_AverageAnnualReturnCaption Average Annual Total Returns ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (For the periods ended December 31, 2024)
Value Portfolio | Value Portfolio | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock As with any mutual fund, the value of the Fund’s investments, and therefore the value of your shares, may go up or down and you could lose money.
Value Portfolio | Value Portfolio | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Value Portfolio | Value Portfolio | Equity Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Equity Securities Risk: Equity securities tend to go up and down in value, sometimes rapidly and unpredictably. Income from equity securities may be reduced by changes in the dividend policies of issuers in which this portion of the Fund invests and there is no guarantee that issuers will distribute dividends in the future or that dividends will remain at current levels or increase over time.
Value Portfolio | Value Portfolio | Value Companies Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Value Companies Risk: Value companies are those that a portfolio manager believes are undervalued and trading for less than their intrinsic values. There is a risk that the determination that a stock is undervalued is not correct or is not recognized in the market.
Value Portfolio | Value Portfolio | Large-Capitalization Companies Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Large-Capitalization Companies Risk: Although large-capitalization companies tend to have more stable prices than smaller, less established companies, they are still subject to equity securities risk. In addition, large-capitalization equity security prices may not rise as much as prices of equity securities of small-capitalization companies.
Value Portfolio | Value Portfolio | Active Management Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Active Management Risk: A portfolio manager’s judgments about the potential value or price appreciation of an investment may prove to be incorrect or fail to have the intended results, which could negatively impact the Fund’s performance.
Value Portfolio | Value Portfolio | Consumer Non-Cyclical Sector Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Consumer Non-Cyclical Sector Risk: Companies in the Consumer Non-cyclical products and services sector (which are generally considered essential staples) may be adversely impacted by changes in domestic and global economic conditions, consumer confidence and preferences, disposable household income and consumer spending, product cycles, marketing, demographics, production spending, competition, government regulations and factors impacting the supply, demand and prices of raw materials.
Value Portfolio | Value Portfolio | Mid-Capitalization Companies Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Mid-Capitalization Companies Risk: Mid-capitalization companies may be subject to greater price volatility and may be more vulnerable to economic, market and industry changes than larger, more established companies.
Value Portfolio | Value Portfolio | Underlying Fund Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Underlying Fund Risk: Because the Fund is available for investment by one or more “fund of funds” of the Trust and thus may have a significant percentage of its outstanding shares held by such fund of funds, a change in asset allocation by the fund of funds could result in large redemptions out of the Fund, causing the sale of securities in a short timeframe and potential increases in expenses to the Fund and its remaining shareholders, both of which could negatively impact performance.
Value Portfolio | Value Portfolio | Securities Lending Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
Securities Lending Risk: The Fund may engage in securities lending, which involves the risk that the Fund may suffer a loss if the borrower fails to return the loaned securities in a timely manner or at all. The Fund could also lose money due to the decline in the value of the collateral provided or a decline in the value of any investments made with cash collateral.
Value Portfolio | Value Portfolio | Class I  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.71%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.20%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.04%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.95%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.86%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 88
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 294
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 517
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,158
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 88
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 294
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 517
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,158
Value Portfolio | Value Portfolio | Class P  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.71%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.04%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.75%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.66%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 67
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 231
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 408
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 922
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 67
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 231
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 408
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 922
Value Portfolio | Russell 1000 Value Index (reflects no deductions for fees, expenses, or taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 1000 Value Index (reflects no deductions for fees, expenses, or taxes)
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.37%
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.68%
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.49%
Value Portfolio | S&P 500 Index (reflects no deductions for fees, expenses, or taxes) (Regulatory Index)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel S&P 500 Index (reflects no deductions for fees, expenses, or taxes) (Regulatory Index)
Average Annual Return, Percent oef_AvgAnnlRtrPct 25.02%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.53%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.10%
Value Portfolio | Class I  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct (6.05%)
Annual Return [Percent] oef_AnnlRtrPct 17.50%
Annual Return [Percent] oef_AnnlRtrPct 17.76%
Annual Return [Percent] oef_AnnlRtrPct (12.37%)
Annual Return [Percent] oef_AnnlRtrPct 24.72%
Annual Return [Percent] oef_AnnlRtrPct (6.94%)
Annual Return [Percent] oef_AnnlRtrPct 21.64%
Annual Return [Percent] oef_AnnlRtrPct (0.53%)
Annual Return [Percent] oef_AnnlRtrPct 3.77%
Annual Return [Percent] oef_AnnlRtrPct 10.14%
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Class I (incepted October 2, 2000)
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.14%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.17%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.22%
Performance Inception Date oef_PerfInceptionDate Oct. 02, 2000
Value Portfolio | Class P  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Class P (incepted May 2, 2011)
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.36%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.39%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.43%
Performance Inception Date oef_PerfInceptionDate May 02, 2011
[1] The investment adviser has agreed to waive 0.085% of its management fee through April 30, 2026. Thereafter, the fee waiver agreement renews annually unless terminated by the investment adviser upon at least 30 days written notice prior to the end of the contract term or upon termination of the investment advisory agreement or by the Trust upon 90 days’ written notice to the investment adviser.