S000013696 [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 10-20 Year Treasury Bond ETF | iShares 10-20 Year Treasury Bond ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | (4.00%) | 3.97% | (25.44%) | (5.34%) | 13.60% | 10.83% | (0.10%) | 4.06% | 0.91% | 1.28% |