S000015626 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 224 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% | |
| FTSE Nareit All Mortgage Capped Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 13.97% | 2.24% | 4.53% | |
| iShares Mortgage Real Estate ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 13.24% | 1.66% | 3.90% | |
| Performance Inception Date | May 01, 2007 | |||
| iShares Mortgage Real Estate ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 9.98% | (1.26%) | 0.94% | |
| iShares Mortgage Real Estate ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 8.40% | 0.24% | 1.91% |