First Trust Ultra Short Duration Municipal ETF Annual Total Returns |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| First Trust Ultra Short Duration Municipal ETF | First Trust Ultra Short Duration Municipal ETF | ||||||
| Prospectus [Line Items] | ||||||
| Annual Return [Percent] | 2.79% | 3.20% | (0.08%) | 0.33% | 1.40% | 1.81% |