SA AB Small and Mid Cap Value Portfolio Expense Example - SA AB Small and Mid Cap Value Portfolio |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class 1 | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 93 |
| Expense Example, with Redemption, 3 Years | 305 |
| Expense Example, with Redemption, 5 Years | 535 |
| Expense Example, with Redemption, 10 Years | 1,195 |
| Class 2 | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 108 |
| Expense Example, with Redemption, 3 Years | 352 |
| Expense Example, with Redemption, 5 Years | 616 |
| Expense Example, with Redemption, 10 Years | 1,368 |
| Class 3 | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 118 |
| Expense Example, with Redemption, 3 Years | 383 |
| Expense Example, with Redemption, 5 Years | 669 |
| Expense Example, with Redemption, 10 Years | $ 1,482 |