S000004308 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 305 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| S&P Total Market Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.05% | 13.07% | 14.22% | |
| S&P MidCap 400 Growth Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 7.46% | 7.12% | 10.44% | |
| iShares S&P Mid-Cap 400 Growth ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 7.29% | 6.97% | 10.23% | |
| Performance Inception Date | Jul. 24, 2000 | |||
| iShares S&P Mid-Cap 400 Growth ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 7.10% | 6.73% | 9.96% | |
| iShares S&P Mid-Cap 400 Growth ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.41% | 5.42% | 8.38% |