S000088434 [Member] Average Annual Total Returns |
12 Months Ended | 14 Months Ended |
|---|---|---|
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% | 16.12% |
| S&P 500 Top 20 Select Index (Returns do not reflect deductions for fees, expenses or taxes) | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 20.68% | 22.95% |
| iShares Top 20 U.S. Stocks ETF | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 20.45% | 22.59% |
| Performance Inception Date | Oct. 23, 2024 | |
| iShares Top 20 U.S. Stocks ETF | After Taxes on Distributions | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 20.33% | 22.47% |
| iShares Top 20 U.S. Stocks ETF | After Taxes on Distributions and Sales | ||
| Prospectus [Line Items] | ||
| Average Annual Return, Percent | 12.17% | 17.27% |