S000071703 [Member] Average Annual Total Returns |
12 Months Ended | 56 Months Ended |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg Municipal Bond Index (Reflects no deduction for fees, expenses or taxes) | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 4.25% | 0.74% |
| SIFMA Municipal Swap Index (Reflects no deduction for fees, expenses or taxes) | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 2.68% | 2.27% |
| BATS: Short Term Municipal Income Series | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 2.79% | 2.28% |
| Performance Inception Date | May 05, 2021 | |
| BATS: Short Term Municipal Income Series | After Taxes on Distributions | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 2.79% | 2.27% |
| Performance Inception Date | May 05, 2021 | |
| BATS: Short Term Municipal Income Series | After Taxes on Distributions and Sales | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 2.79% | 2.28% |
| Performance Inception Date | May 05, 2021 |