S000046220 [Member] Annual Fund Operating Expenses - BATS: High Income Municipal Series - BATS: High Income Municipal Series |
Mar. 31, 2026 |
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| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.00% | |||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||
| Component1 Other Expenses | 0.07% | |||||
| Component2 Other Expenses | 0.16% | |||||
| Other Expenses (as a percentage of Assets): | 0.23% | |||||
| Expenses (as a percentage of Assets) | 0.23% | |||||
| Fee Waiver or Reimbursement | (0.07%) | [1] | ||||
| Net Expenses (as a percentage of Assets) | 0.16% | [1],[2] | ||||
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