SCB Classand Advisor Class [Member] Expense Example - Institutional - International Small Cap Portfolio |
Sep. 30, 2025
USD ($)
|
|---|---|
| Advisor Class | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 111 |
| Expense Example, with Redemption, 3 Years | 347 |
| Expense Example, with Redemption, 5 Years | 601 |
| Expense Example, with Redemption, 10 Years | 1,329 |
| SCB Class | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 135 |
| Expense Example, with Redemption, 3 Years | 421 |
| Expense Example, with Redemption, 5 Years | 729 |
| Expense Example, with Redemption, 10 Years | $ 1,601 |