SA Allocation Moderately Aggressive Portfolio Investment Strategy - SA Allocation Moderately Aggressive Portfolio	Mar. 31, 2025
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:12pt;font-style:italic;font-weight:bold;">Principal Investment Strategies of the Portfolio</span>
Strategy Narrative [Text Block]	The Portfolio is structured as a “fund-of-funds,” which means that it pursues its investment goal by investing its assets in a combination of the portfolios of the Trust and SunAmerica Series Trust (collectively, the “Underlying Portfolios”). The Portfolio attempts to achieve its investment goal by investing its assets, under normal circumstances, among a combination of Underlying Portfolios, of which at least 30% and no more than 90% of its net assets will be invested in equity portfolios and at least 10% and no more than 70% of its net assets will be invested in fixed income portfolios. The Underlying Portfolios have a variety of investment styles and focuses. The underlying equity portfolios include large, mid and small cap portfolios, growth and value-oriented portfolios and international portfolios. The underlying fixed income portfolios include portfolios that invest in U.S. and non-U.S. issuers, corporate, mortgage-backed and government securities, investment grade securities, and securities rated below investment grade (commonly known as “junk bonds”).SunAmerica determines the Portfolio’s target asset class allocation. The target asset class allocation is generally broken down into the following asset classes: large cap growth/value stocks, mid cap growth/value stocks, small cap stocks, international stocks and bonds (investment grade, high-yield, inflation-protected). Based on these target asset class allocations, SunAmerica determines a target portfolio allocation in which the Portfolio will invest in the Underlying Portfolios. The target allocation percentages as of March 31, 2025 were:•Large cap growth/value stocks41.3%•Mid cap growth/value stocks4.7%•Small cap growth/value stocks2.7%•International stocks16.3%•Investment grade securities31.0%•High-yield securities2.3%•Inflation-protected securities1.7%SunAmerica performs an investment analysis of possible investments for the Portfolio and selects the universe of permitted Underlying Portfolios as well as the allocation to each Underlying Portfolio. SunAmerica reserves the right to change the Portfolio’s asset allocation among the Underlying Portfolios. SunAmerica may change the target asset allocation percentage and may underweight or overweight such asset classes at its discretion. The percentage of the Portfolio’s assets invested in any of the Underlying Portfolios will vary from time to time.

SA Allocation Moderately Aggressive Portfolio Investment Strategy - SA Allocation Moderately Aggressive Portfolio

Mar. 31, 2025

<span style="color:#000000;font-family:Arial;font-size:12pt;font-style:italic;font-weight:bold;">Principal Investment Strategies of the Portfolio</span>

Strategy Narrative [Text Block]

The Portfolio is structured as a “fund-of-funds,” which means that it pursues its investment goal by investing its assets in a combination of the portfolios of the Trust and SunAmerica Series Trust (collectively, the “Underlying Portfolios”). The Portfolio attempts to achieve its investment goal by investing its assets, under normal circumstances, among a combination of Underlying Portfolios, of which at least 30% and no more than 90% of its net assets will be invested in equity portfolios and at least 10% and no more than 70% of its net assets will be invested in fixed income portfolios. The Underlying Portfolios have a variety of investment styles and focuses. The underlying equity portfolios include large, mid and small cap portfolios, growth and value-oriented portfolios and international portfolios. The underlying fixed income portfolios include portfolios that invest in U.S. and non-U.S. issuers, corporate, mortgage-backed and government securities, investment grade securities, and securities rated below investment grade (commonly known as “junk bonds”).SunAmerica determines the Portfolio’s target asset class allocation. The target asset class allocation is generally broken down into the following asset classes: large cap growth/value stocks, mid cap growth/value stocks, small cap stocks, international stocks and bonds (investment grade, high-yield, inflation-protected). Based on these target asset class allocations, SunAmerica determines a target portfolio allocation in which the Portfolio will invest in the Underlying Portfolios. The target allocation percentages as of March 31, 2025 were:•Large cap growth/value stocks41.3%•Mid cap growth/value stocks4.7%•Small cap growth/value stocks2.7%•International stocks16.3%•Investment grade securities31.0%•High-yield securities2.3%•Inflation-protected securities1.7%SunAmerica performs an investment analysis of possible investments for the Portfolio and selects the universe of permitted Underlying Portfolios as well as the allocation to each Underlying Portfolio. SunAmerica reserves the right to change the Portfolio’s asset allocation among the Underlying Portfolios. SunAmerica may change the target asset allocation percentage and may underweight or overweight such asset classes at its discretion. The percentage of the Portfolio’s assets invested in any of the Underlying Portfolios will vary from time to time.