S000001469 [Member] Expense Example - BATS: Corporate Credit Total Return Series - BATS: Corporate Credit Total Return Series |
Mar. 31, 2026
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 0 |
| Expense Example, with Redemption, 3 Years | 0 |
| Expense Example, with Redemption, 5 Years | 0 |
| Expense Example, with Redemption, 10 Years | $ 0 |