S000004347 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 308 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 1000 Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.37% | 13.59% | 14.59% | |
| iShares Russell 1000 ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.19% | 13.43% | 14.44% | |
| Performance Inception Date | May 15, 2000 | |||
| iShares Russell 1000 ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 16.89% | 13.09% | 14.01% | |
| iShares Russell 1000 ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 10.36% | 10.70% | 12.04% |