v3.26.1
SA Global Index Allocation 90-10 Portfolio Expense Example - SA Global Index Allocation 90-10 Portfolio
Dec. 31, 2025
USD ($)
Class 1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 53
Expense Example, with Redemption, 3 Years 167
Expense Example, with Redemption, 5 Years 291
Expense Example, with Redemption, 10 Years 653
Class 3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 79
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 428
Expense Example, with Redemption, 10 Years $ 954