v3.26.1
SA Global Index Allocation 75-25 Portfolio Expense Example - SA Global Index Allocation 75-25 Portfolio
Dec. 31, 2025
USD ($)
Class 1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 57
Expense Example, with Redemption, 3 Years 184
Expense Example, with Redemption, 5 Years 322
Expense Example, with Redemption, 10 Years 724
Class 3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 83
Expense Example, with Redemption, 3 Years 263
Expense Example, with Redemption, 5 Years 459
Expense Example, with Redemption, 10 Years $ 1,023