S000047014 [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| BATS: Securitized Total Return Series | BATS: Securitized Total Return Series | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.34% | 8.46% | 8.59% | (5.05%) | 2.66% | 2.98% | 6.79% | 2.60% | 6.39% | 7.10% |