v3.26.1
SA JPMorgan MFS Core Bond Portfolio Expense Example - SA JPMorgan MFS Core Bond Portfolio
Dec. 31, 2025
USD ($)
Class 1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 54
Expense Example, with Redemption, 3 Years 192
Expense Example, with Redemption, 5 Years 341
Expense Example, with Redemption, 10 Years 777
Class 2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 69
Expense Example, with Redemption, 3 Years 239
Expense Example, with Redemption, 5 Years 423
Expense Example, with Redemption, 10 Years 957
Class 3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 80
Expense Example, with Redemption, 3 Years 271
Expense Example, with Redemption, 5 Years 478
Expense Example, with Redemption, 10 Years $ 1,075