S000000003 [Member] Investment Risks - SA Franklin Core Fixed Income Portfolio |
Dec. 31, 2025 |
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| Fixed Income Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fixed Income Securities Risk. Prices of fixed income securities generally rise and fall in response to, among other things, interest rate changes. Volatility in interest rates and in fixed income markets may increase the risk that the Portfolio’s investments in fixed income securities could lose money. In addition, the Portfolio could lose money if the issuer or guarantor of a fixed income security or other issuer of credit support is unable or unwilling to make timely principal and/or interest payments, or to otherwise honor its obligations. Fixed income securities may be downgraded in credit rating or go into default.
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| Interest Rate Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Interest Rate Risk. Fixed income securities may be subject to volatility due to changes in interest rates. The value of fixed-income securities may decline when interest rates go up or increase when interest rates go down. The interest earned on fixed-income securities may decline when interest rates go down or increase when interest rates go up. Duration is a measure of interest rate risk that indicates how price-sensitive a bond is to changes in interest rates. Longer-term and lower coupon bonds tend to be more sensitive to changes in interest rates. For example, a bond with a duration of three years will decrease in value by approximately 3% if interest rates increase by 1%. Changing interest rates may have unpredictable effects on markets, may result in heightened market volatility, and could negatively impact the Portfolio’s performance. Any future changes in monetary policy made by central banks and/or their governments are likely to affect the level of interest rates.
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| Credit Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk. The risk that an issuer will default on interest or principal payments. The Portfolio could lose money if the issuer of a debt security is unable or perceived to be unable to pay interest or to repay principal when it becomes due. Various factors could affect the issuer’s actual or perceived willingness or ability to make timely interest or principal payments, including changes in the issuer’s financial condition or in general economic conditions. Debt securities backed by an issuer’s taxing authority may be subject to legal limits on the issuer’s power to increase taxes or otherwise raise revenue, or may be dependent on legislative appropriation or government aid. Certain debt securities are backed only by revenues derived from a particular project or source, rather than by an issuer’s taxing authority, and thus may have a greater risk of default. Credit risk applies to most debt securities, but is generally not a factor for obligations backed by the “full faith and credit” of the U.S. Government. An issuer with a lower credit rating will be more likely than a higher rated issuer to default or otherwise become unable to honor its financial obligations. Issuers with low credit ratings typically issue junk bonds. In addition to the risk of default, junk bonds may be more volatile, less liquid, more difficult to value and more susceptible to adverse economic conditions or investor perceptions than other bonds.
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| Derivatives Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. A derivative is any financial instrument whose value is based on, and determined by, another security, index, rate, currency or benchmark (i.e., stock options, futures, caps, floors, etc.). To the extent a derivative contract is used to hedge another position in the Portfolio, the Portfolio will be exposed to the risks associated with hedging described below. To the extent an option, futures contract, swap, or other derivative is used with the goal of enhancing return, rather than as a hedge, the Portfolio will be directly exposed to the risks of the contract. Unfavorable changes in the value of the underlying security, index, rate or benchmark may cause sudden losses. Gains or losses from the Portfolio’s use of derivatives may be substantially greater than the amount of the Portfolio’s investment. Certain derivatives have the potential for unlimited loss. Derivatives are also associated with various other risks, including market risk, leverage risk, hedging risk, counterparty risk, valuation risk, regulatory risk, illiquidity risk and interest rate fluctuations risk. The primary risks associated with the Portfolio’s use of derivatives are market risk, counterparty risk and hedging risk.
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| Fundamental Investing Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fundamental Investing Risk. A fundamental investment approach uses research and analysis of a variety of factors to create a forecast of company results, which is used to select securities. The process may result in an evaluation of a security’s value that may be incorrect or, if correct, may not be reflected by the market. Security or instrument selection using a fundamental investment approach may also cause the Portfolio to underperform other funds with similar investment objectives and investment strategies even in a rising market.
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| When Issued Securities Delayed Delivery and Forward Commitment Transactions Risk [Member] | |
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| Risk [Text Block] | When-Issued Securities, Delayed Delivery and Forward Commitment Transactions Risk. A Portfolio may purchase or sell when-issued securities that have been authorized but not yet issued in the market. A firm commitment is a buy order for delayed delivery in which a Portfolio agrees to purchase a security from a seller at a future date, stated price, and fixed yield.
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| U S and Non U S Corporate Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. and Non-U.S. Corporate Debt Securities Risk. Investments in U.S. and non-U.S. corporate debt securities are subject to interest rate risk and market risk and are affected by perceptions of the creditworthiness and business prospects of individual issuers. Non-U.S. corporate debt securities may expose the Portfolio to greater risk than investments in U.S. corporate debt securities.
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| Mortgage and Asset Backed Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Mortgage- and Asset-Backed Securities Risk. The characteristics of mortgage-backed and asset-backed securities differ from traditional fixed income securities. Mortgage-backed securities are subject to “prepayment risk” and “extension risk.” Prepayment risk is the risk that, when interest rates fall, certain types of obligations will be paid off by the obligor more quickly than originally anticipated and the Portfolio may have to invest the proceeds in securities with lower yields. Extension risk is the risk that, when interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. Small movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain mortgage-backed and asset-backed securities. Mortgage-backed and asset-backed securities are also subject to credit risk.
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| Loan Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Loan Risk. Loans are subject to the credit risk of nonpayment of principal or interest. Economic downturns or increases in interest rates may cause an increase in defaults, interest rate risk and illiquidity risk. Loans may or may not be collateralized at the time of acquisition, and any collateral may lack liquidity or lose all or substantially all of its value subsequent to investment. In the event of bankruptcy of a borrower, the Portfolio could experience delays or limitations with respect to its ability to realize the benefits of any collateral securing a loan.
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| Non U S Debt Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Non-U.S. Debt Risk. The value of an investment in non-U.S. debt, even when U.S. dollar denominated, may be affected by political, economic or social conditions. Non-U.S. debt may also be subject to risk of loss because of more or less foreign government regulation, less public information and less stringent investor protections and disclosure standards.
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| U S Government Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. Government Obligations Risk. U.S. Treasury obligations are backed by the “full faith and credit” of the U.S. Government and generally have negligible credit risk. Securities issued or guaranteed by federal agencies or authorities and U.S. Government-sponsored instrumentalities or enterprises may or may not be backed by the full faith and credit of the U.S. Government.
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| Affiliated Fund Rebalancing Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Affiliated Fund Rebalancing Risk. The Portfolio may be an investment option for other mutual funds for which SunAmerica serves as investment adviser that are managed as “funds of funds.” From time to time, the Portfolio may experience relatively large redemptions or investments due to the rebalancing of a fund of funds. In the event of such redemptions or investments, the Portfolio could be required to sell securities or to invest cash at a time when it is not advantageous to do so.
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| Active Trading Risk [Member] | |
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| Risk [Text Block] | Active Trading Risk. The Portfolio may engage in frequent trading of securities to achieve its investment goal. Active trading may result in high portfolio turnover and correspondingly greater brokerage commissions and other transaction costs, which will be borne directly by the Portfolio and could affect its performance. During periods of increased market volatility, active trading may be more pronounced.
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| Market Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The Portfolio’s share price or the market as a whole can decline for many reasons or be adversely affected by a number of factors, including, without limitation: weakness in the broad market, a particular industry, or specific holdings; adverse social, political, regulatory or economic developments in the United States or abroad; changes in investor psychology; technological disruptions; heavy institutional selling; military confrontations, war, terrorism and other armed conflicts, trade wars and sanctions, disease/virus outbreaks and epidemics; recessions; taxation and international tax treaties; currency, interest rate and price fluctuations; and other conditions or events.
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| Risk Lose Money [Member] | |
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| Risk [Text Block] | If the value of the assets of the Portfolio goes down, you could lose money. |
| Risk Not Insured Depository Institution [Member] | |
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| Risk [Text Block] | Shares of the Portfolio are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation. |