S000023506 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 206 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg U.S. Universal Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 7.58% | 0.06% | 2.44% | |
| Bloomberg U.S. Agency Bond Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 6.11% | 0.91% | 2.05% | |
| iShares Agency Bond ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 5.94% | 0.93% | 2.05% | |
| Performance Inception Date | Nov. 05, 2008 | |||
| iShares Agency Bond ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.32% | (0.12%) | 1.11% | |
| iShares Agency Bond ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 3.49% | 0.26% | 1.16% |