S000026553 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 195 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Russell 3000 Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.15% | 13.15% | 14.29% | |
| Russell Top 200 Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 19.19% | 15.14% | 15.78% | |
| iShares Russell Top 200 ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 19.00% | 14.98% | 15.61% | |
| Performance Inception Date | Sep. 22, 2009 | |||
| iShares Russell Top 200 ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 18.72% | 14.64% | 15.18% | |
| iShares Russell Top 200 ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 11.42% | 11.99% | 13.10% |