S000000003 [Member] Expense Example, No Redemption - SA Franklin Core Fixed Income Portfolio |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class 1 | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 49 |
| Expense Example, No Redemption, 3 Years | 168 |
| Expense Example, No Redemption, 5 Years | 314 |
| Expense Example, No Redemption, 10 Years | 737 |
| Class 3 | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 75 |
| Expense Example, No Redemption, 3 Years | 248 |
| Expense Example, No Redemption, 5 Years | 451 |
| Expense Example, No Redemption, 10 Years | $ 1,036 |