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Label Element Value
Commodity Return Strategy Portfolio  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading Portfolio Summary
Objective [Heading] oef_ObjectiveHeading Investment objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

The portfolio seeks total return.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and portfolio expenses
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

The accompanying table describes the fees and expenses you may pay if you buy, hold and sell shares of the portfolio. The fee table and the expense example do not reflect expenses or withdrawal charges incurred from investing through a variable contract or qualified plan and do not reflect variable annuity or life insurance contract charges. If they did, the overall fees and expenses would be higher than those shown. Detailed information about the cost of investing in the portfolio through a variable contract or qualified plan is presented in the contract prospectus through which the portfolio's shares are offered to you or in the plan documents or other informational materials supplied by plan sponsors.
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual portfolio operating expenses (expenses that you pay as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination May 01, 2026
Expenses Represent Both Master and Feeder [Text] oef_ExpensesRepresentBothMasterAndFeeder The portfolio invests in Credit Suisse Cayman Commodity Fund II, Ltd., a wholly-owned subsidiary of the portfolio organized under the laws of the Cayman Islands (the "Subsidiary"). "Other Expenses" include expenses of both the portfolio and the Subsidiary.
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This example may help you compare the cost of investing in shares of the portfolio with the cost of investing in other mutual funds. The example does not include expenses or withdrawal charges incurred from investing through a variable annuity or life insurance contract or qualified plan. If the example included these expenses, the figures shown would be higher.

Assume you invest $10,000, the portfolio returns 5% annually, expense ratios remain the same and you close your account at the end of each of the time periods shown. Although your actual costs may be higher or lower, based on these assumptions, your cost would be:
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

The computation of the portfolio's portfolio turnover rate for regulatory purposes excludes trades of derivatives and instruments with a maturity of one year or less. However, the portfolio expects to engage in frequent trading of derivatives, which could have tax consequences that impact shareholders, such as the realization of taxable short-term capital gains. In addition, the portfolio could incur transaction costs, such as commissions, when it buys and sells securities and other instruments. Transaction costs, which are not reflected in annual portfolio operating expenses or in the example, affect the portfolio's performance. During the fiscal year ended December 31, 2024, the portfolio's portfolio turnover rate was 43% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 43.00%
Strategy [Heading] oef_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

The portfolio is designed to achieve positive total return relative to the performance of the Bloomberg Commodity Index Total Return (the "BCOM Index"). The portfolio intends to invest its assets in a combination of commodity-linked derivative instruments and fixed income securities. The portfolio intends to gain exposure to commodities markets by investing through the Subsidiary and in structured notes linked to the BCOM Index, other commodity indices, or the value of a particular commodity or commodity futures contract or subset of commodities or commodity futures contracts. The value of these investments will rise or fall in response to changes in the underlying index or commodity. The portfolio intends to engage in active and frequent trading.

The portfolio may invest up to 25% of its total assets in the Subsidiary, a wholly-owned subsidiary of the portfolio organized under the laws of the Cayman Islands. The portfolio will invest in the Subsidiary primarily to gain

exposure to the commodities markets within the limitations of the federal tax laws, rules and regulations that apply to regulated investment companies. Generally, the Subsidiary will invest in commodity-linked derivative instruments, but it will also invest in fixed income instruments, including U.S. government securities, U.S. government agency securities, corporate bonds, debentures and notes, mortgage-backed and other asset-backed securities, event-linked bonds, loan participations, bank certificates of deposit, fixed time deposits, bankers' acceptances, commercial paper and other short-term fixed income securities. The primary purpose of the fixed income instruments held by the Subsidiary will be to serve as collateral for the Subsidiary's derivative positions; however, these instruments are also expected to earn income for the Subsidiary.

The portfolio invests in a portfolio of fixed income securities normally having an average duration of one year or less, and emphasizes investment-grade fixed income securities.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The accompanying bar chart and table provide an indication of the risks of investing in the portfolio. The bar chart shows you how performance of the portfolio's Class 1 shares (which was previously an undesignated share class of the portfolio), has varied from year to year for up to 10 years. The table compares the portfolio's performance to the BCOM Index, which is currently composed of futures contracts on 24 physical commodities. The bar chart and table do not reflect additional charges and expenses which are, or may be, imposed under the variable contracts or plans; such charges and expenses are described in the prospectus of the insurance company separate account or in the plan documents or other informational materials supplied by plan sponsors. Inclusion of these charges would reduce the total return for the periods shown. As with all mutual funds, past performance is not a prediction of future performance.

The portfolio makes updated performance available at the portfolio's website (www.credit-suisse.com/us/funds) or by calling Credit Suisse Funds at 877-870-2874.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The accompanying bar chart and table provide an indication of the risks of investing in the portfolio.
Performance Additional Market Index [Text] oef_PerformanceAdditionalMarketIndex The table compares the portfolio's performance to the BCOM Index, which is currently composed of futures contracts on 24 physical commodities.
Performance Availability Phone [Text] oef_PerformanceAvailabilityPhone 877-870-2874
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress (www.credit-suisse.com/us/funds)
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture As with all mutual funds, past performance is not a prediction of future performance.
Bar Chart [Heading] oef_BarChartHeading Year-by-year total returns
Bar Chart Does Not Reflect Sales Loads [Text] oef_BarChartDoesNotReflectSalesLoads The bar chart and table do not reflect additional charges and expenses which are, or may be, imposed under the variable contracts or plans; such charges and expenses are described in the prospectus of the insurance company separate account or in the plan documents or other informational materials supplied by plan sponsors. Inclusion of these charges would reduce the total return for the periods shown.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Best quarter: 25.39% (Q1 2022)
Worst quarter: (22.17)% (Q1 2020)
Inception date: 2/28/06
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best quarter:
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Mar. 31, 2022
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 25.39%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst quarter:
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (22.17%)
Performance Table Heading oef_PerformanceTableHeading Average annual total returns
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees or expenses)
Commodity Return Strategy Portfolio | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Simply defined, risk is the possibility that you will lose money or not make money.
Commodity Return Strategy Portfolio | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investments in the portfolio are not bank deposits and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Commodity Return Strategy Portfolio | Commodity exposure risks [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Commodity exposure risks: The portfolio's and the Subsidiary's investments in commodity-linked derivative instruments may subject the portfolio to greater volatility than investments in traditional securities, particularly if the instruments involve leverage. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as drought, floods, weather, livestock disease, embargoes, tariffs and international economic, and political and regulatory developments.

Use of leveraged commodity-linked derivatives creates an opportunity for increased return but, at the same time, creates the possibility for greater loss (including the likelihood of greater volatility of the portfolio's net asset value), and there can be no assurance that the portfolio's use of leverage will be successful.
Commodity Return Strategy Portfolio | Correlation risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Correlation risk: Changes in the value of a hedging instrument may not match those of the investment being hedged. In addition, certain of the portfolio's commodity-linked derivative investments may result in the portfolio's performance diverging from the BCOM Index, perhaps materially. For example, a structured note can be structured to limit the loss or the gain on the investment, which would result in the portfolio not participating in declines or increases in the BCOM Index that exceed the limits.
Commodity Return Strategy Portfolio | Credit Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Credit risk: The issuer of a debt instrument or the counterparty to a contract, including derivatives contracts, may default or otherwise become unable to honor a financial obligation. Changes in an issuer's credit rating or the market's perception of an issuer's creditworthiness also may affect the value of the portfolio's investment in that issuer.
Commodity Return Strategy Portfolio | Derivatives risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Derivatives risk: Derivatives are financial contracts whose value depends on, or is derived from, the value of an underlying asset, reference rate or index. The portfolio typically uses derivatives as a substitute for taking a position in the underlying asset and/or as part of a strategy designed to reduce exposure to other risks, such as interest rate or currency risk. The portfolio also may use derivatives for leverage. The portfolio's use of derivative instruments, particularly commodity-linked derivatives, involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. Derivatives are subject to a number of risks described elsewhere in this Prospectus, such as commodity exposure risks, correlation risk, credit risk, illiquidity risk, interest rate risk, leveraging risk, market risk and regulatory risk. Also, suitable derivative transactions may not be available in all circumstances and there can be no assurance that the portfolio will engage in these transactions to reduce exposure to other risks when that would be beneficial.
Commodity Return Strategy Portfolio | Exposure risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Exposure risk: The risk associated with investments (such as derivatives) or practices (such as short selling) that increase the amount of money the portfolio could gain or lose on an investment.

•  Hedged Exposure risk could multiply losses generated by a derivative or practice used for hedging purposes. Such losses should be substantially offset by gains on the hedged investment. However, while hedging can

reduce or eliminate losses, it can also reduce or eliminate gains.

•  Speculative To the extent that a derivative or practice is not used as a hedge, the portfolio is directly exposed to its risks. Gains or losses from speculative positions in a derivative may be much greater than the derivative's original cost. For example, potential losses from commodity-linked notes or swap agreements, from writing uncovered call options and from speculative short sales are unlimited.
Commodity Return Strategy Portfolio | Fixed income risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Fixed income risk: The market value of fixed income investments will change in response to interest rate changes and other factors, such as changes in the effective maturities and credit ratings of fixed income investments. During periods of falling interest rates, the values of outstanding fixed income securities and related financial instruments generally rise. Conversely, during periods of rising interest rates, the values of such securities and related financial instruments generally decline. Fixed income investments are also subject to credit risk.
Commodity Return Strategy Portfolio | Focus risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Focus risk: The portfolio will be exposed to the performance of commodities in the BCOM Index, which may from time to time have a small number of commodity sectors (e.g., energy, metals or agricultural) representing a large portion of the index. As a result, the portfolio may be subject to greater volatility than if the index were more broadly diversified among commodity sectors. If the portfolio is exposed to a significant extent to a particular commodity or subset of commodities, the portfolio will be more exposed to the specific risks relating to such commodity or commodities and will be subject to greater volatility than if it were more broadly diversified among commodity sectors.
Commodity Return Strategy Portfolio | Futures contracts risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Futures contracts risk: The risks associated with the portfolio's use of futures contracts and swaps and structured notes that reference the price of futures contracts include the risk that: (i) changes in the price of a futures contract may not always track the changes in market value of the underlying reference asset; (ii) trading restrictions or limitations may be imposed by an exchange, and government regulations may restrict trading in futures contracts; and (iii) if the portfolio has insufficient cash to meet margin requirements, the portfolio may need to sell other investments, including at disadvantageous times.
Commodity Return Strategy Portfolio | Illiquidity risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Illiquidity risk: Certain portfolio holdings, such as commodity-linked notes and swaps, may be difficult or impossible to sell at the time and the price that the portfolio would like. The portfolio may have to lower the price, sell other holdings instead or forgo an investment opportunity. Any of these could have a negative effect on portfolio management or performance. Liquid investments may become illiquid after purchase by the

portfolio, particularly during periods of market turmoil. There can be no assurance that a security or instrument that is deemed to be liquid when purchased will continue to be liquid for as long as it is held by the portfolio.
Commodity Return Strategy Portfolio | Interest Rate Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Interest rate risk: Changes in interest rates may cause a decline in the market value of an investment. With bonds and other fixed income instruments, a rise in interest rates typically causes a fall in values, while a fall in interest rates typically causes a rise in values. Changing interest rates may have unpredictable effects on markets, may result in heightened market volatility, and could negatively impact the portfolio's performance. Generally, the longer the maturity or duration of a debt instrument, the greater the impact of a change in interest on the instrument's value. In periods of market volatility, the market values of fixed income securities may be more sensitive to changes in interest rates.
Commodity Return Strategy Portfolio | Leveraging risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Leveraging risk: The portfolio may invest in certain derivatives that provide leveraged exposure. The portfolio's investment in these instruments generally requires a small investment relative to the amount of investment exposure assumed. As a result, such investments may cause the portfolio to lose more than the amount it invested in those instruments. The net asset value of the portfolio when employing leverage will be more volatile and sensitive to market movements. Leverage may involve the creation of a liability that requires the portfolio to pay interest.
Commodity Return Strategy Portfolio | Market risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Market risk: The market value of a security may fluctuate, sometimes rapidly and unpredictably due to changes in general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or factors that affect a particular issuer or issuers, exchange, country, group of countries, region, market, industry, group of industries, sector or asset class. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issue, natural disasters, recessions, or other events could have a significant impact on the portfolio and its investments. These fluctuations, which are often referred to as "volatility," may cause an instrument to be worth less than it was worth at an earlier time.

Market risk may affect a single issuer, industry, commodity, sector of the economy, or the market as a whole. Market risk is common to most investments—including stocks, bonds and commodities, and the mutual funds that invest in them.

Bonds and other fixed income securities generally involve less market risk than stocks and commodities. The risk of bonds can vary significantly depending upon factors such as issuer and maturity. The bonds of some companies may be riskier than the stocks of others.
Commodity Return Strategy Portfolio | Portfolio turnover risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Portfolio turnover risk: The portfolio expects to engage in frequent trading of derivatives. Active and frequent trading may lead to the realization and distribution to shareholders of higher short-term capital gains, which would increase their tax liability. Frequent trading also increases transaction costs, which could detract from the portfolio's performance.
Commodity Return Strategy Portfolio | Structured note risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Structured note risk: The value of a structured note will be influenced by time to maturity, level of supply and demand for the type of note, interest rate and market volatility, changes in the issuer's credit rating, and economic, legal, political, or geographic events that affect the reference asset. In addition, there may be a lag between a change in the value of the underlying reference asset and the value of the structured note.
Commodity Return Strategy Portfolio | Subsidiary risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Subsidiary risk: By investing in the Subsidiary, the portfolio is indirectly exposed to the risks associated with the Subsidiary's investments. The derivatives and other investments held by the Subsidiary are generally similar to those that are permitted to be held by the portfolio and are subject to the same risks that apply to similar investments if held directly by the portfolio. These risks are described elsewhere in this Prospectus.

The Subsidiary is not registered under the Investment Company Act of 1940, as amended (the "1940 Act"), and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the 1940 Act. However, the portfolio wholly owns and controls the Subsidiary, and the portfolio and the Subsidiary are both managed by UBS AM (Americas), making it unlikely that the Subsidiary will take action contrary to the interests of the portfolio and its shareholders. The Board of Trustees has oversight responsibility for the investment activities of the portfolio, including its investment in the Subsidiary, and the portfolio's role as sole shareholder of the Subsidiary. The Subsidiary will be subject to the same investment restrictions and limitations, and follow the same compliance policies and procedures, as the portfolio.

Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the portfolio and/or the Subsidiary to continue to operate as it does currently and could adversely affect the portfolio.
Commodity Return Strategy Portfolio | Swap agreements risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Swap agreements risk: Swap agreements involve the risk that the party with whom the portfolio has entered into the swap will default on its obligation to pay the portfolio and the risk that the portfolio will not be able to meet its obligations to pay the other party to the agreement.
Commodity Return Strategy Portfolio | Tax risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Tax risk: In order to qualify for treatment as a regulated investment company (a "RIC") under the Internal Revenue Code of 1986, as amended (the "Code"), the portfolio must meet certain requirements regarding the

source of its income, the diversification of its assets and the distribution of its income. The Internal Revenue Service ("IRS") has issued a ruling that income realized from certain types of commodity-linked swaps would not be qualifying income for purposes of the source of income requirement. As a result, the income the portfolio derives directly from such commodity-linked swaps or certain other commodity-linked derivatives must be limited to a maximum of 10% of its gross income. The portfolio seeks to gain exposure to the commodity markets indirectly through its investments in the Subsidiary, which invests in commodity-linked swaps, commodity futures and other derivatives, and directly through investments in commodity-linked notes. If the portfolio fails to qualify as a RIC, the portfolio will be subject to federal income tax on its net income at regular corporate rates (without reduction for distributions to shareholders).

When distributed, that income also would be taxable to shareholders as an ordinary dividend to the extent attributable to the portfolio's current or accumulated earnings and profits. If the portfolio were to fail to qualify as a RIC and became subject to federal income tax, shareholders of the portfolio would be subject to diminished returns. The portfolio anticipates treating income and gain from the Subsidiary and from commodity-linked notes as qualifying income.
Commodity Return Strategy Portfolio | U.S. government securities risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

U.S. government securities risk: Obligations of U.S. government agencies and authorities are supported by varying degrees of credit but generally are not backed by the full faith and credit of the U.S. government. No assurance can be given that the U.S. government will provide financial support to its agencies and authorities if it is not obligated by law to do so.
Commodity Return Strategy Portfolio | Class 1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption
Exchange Fee (as a percentage of Amount Redeemed) oef_ExchangeFeeOverRedemption
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.59%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.22% [1]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.06%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 1.05%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 336
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 584
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,293
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 107
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 336
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 584
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,293
Commodity Return Strategy Portfolio | Class 2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption
Exchange Fee (as a percentage of Amount Redeemed) oef_ExchangeFeeOverRedemption
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.59%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.22% [1]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.81%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.80%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 82
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 258
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 449
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,001
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 82
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 258
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 449
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,001
Bloomberg Commodity Index Total Return (reflects no deductions for fees or expenses)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.38%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.77%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.28%
Class 1  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct (25.10%)
Annual Return [Percent] oef_AnnlRtrPct 12.02%
Annual Return [Percent] oef_AnnlRtrPct 1.52%
Annual Return [Percent] oef_AnnlRtrPct (11.66%)
Annual Return [Percent] oef_AnnlRtrPct 6.69%
Annual Return [Percent] oef_AnnlRtrPct (1.48%)
Annual Return [Percent] oef_AnnlRtrPct 27.90%
Annual Return [Percent] oef_AnnlRtrPct 16.03%
Annual Return [Percent] oef_AnnlRtrPct (9.12%)
Annual Return [Percent] oef_AnnlRtrPct 4.83%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.83%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.85%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.12%
Average Annual Return, Percent oef_AvgAnnlRtrPct (1.04%)
Class 2  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.12%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.95% [3]
Performance Inception Date oef_PerfInceptionDate May 01, 2020
[1] The portfolio invests in Credit Suisse Cayman Commodity Fund II, Ltd., a wholly-owned subsidiary of the portfolio organized under the laws of the Cayman Islands (the "Subsidiary"). "Other Expenses" include expenses of both the portfolio and the Subsidiary.
[2] Credit Suisse Trust (the "Trust") and UBS Asset Management (Americas) LLC ("UBS AM (Americas)") have entered into a written contract limiting operating expenses to 1.05% for Class 1 shares and 0.80% for Class 2 shares of the portfolio's average daily net assets at least through May 1, 2026. This limit excludes certain expenses, including interest charges on fund borrowings, taxes, brokerage commissions, dealer spreads and other transaction charges, expenditures that are capitalized in accordance with generally accepted accounting principles, acquired fund fees and expenses, short sale dividends, and extraordinary expenses (e.g., litigation and indemnification and any other costs and expenses that may be approved by the Trust's board of trustees (the "Board of Trustees")). The Trust is authorized to reimburse UBS AM (Americas) for management fees previously waived and/or for expenses previously paid by UBS AM (Americas), provided, however, that any reimbursement must be paid at a date not more than thirty-six months following the applicable month during which such fees were waived or expenses were paid by UBS AM (Americas) and the reimbursement does not cause the applicable class's aggregate expenses, on an annualized basis to exceed either (i) the applicable expense limited in effect at the time such fees were waived or such expenses were paid by UBS AM (Americas) or (ii) the applicable expense limitation in effect at the time of such reimbursement. This contract may not be terminated before May 1, 2026.
[3] Return represents performance from May 1, 2020 (inception date) to December 31, 2024.