S000004349 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 299 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% | |
| Cohen & Steers Realty Majors Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 2.27% | 5.10% | 5.19% | |
| iShares Select U.S. REIT ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 1.94% | 4.74% | 4.83% | |
| Performance Inception Date | Jan. 29, 2001 | |||
| iShares Select U.S. REIT ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 0.98% | 3.83% | 3.73% | |
| iShares Select U.S. REIT ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 1.36% | 3.39% | 3.34% |