S000004338 [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 |
|
| iShares Russell Mid-Cap ETF | iShares Russell Mid-Cap ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 10.42% | 15.14% | 17.07% | (17.43%) | 22.38% | 16.91% | 30.31% | (9.13%) | 18.32% | 13.58% |