S000023507 [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
Dec. 31, 2015 |
|
| iShares Short-Term National Muni Bond ETF | iShares Short-Term National Muni Bond ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 2.03% | 3.11% | (2.15%) | 0.19% | 2.27% | 3.09% | 1.57% | 0.90% | (0.03%) | 0.65% |