S000004436 [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 ESG Optimized MSCI USA ETF | iShares ESG Optimized MSCI USA ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 15.72% | 22.41% | 23.87% | (21.31%) | 30.31% | 24.64% | 32.18% | (5.56%) | 22.52% | 12.25% |