S000013695 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 228 Months Ended | ||
|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
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| ICE BofA US Broad Market Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 7.15% | (0.42%) | 2.01% | |||
| ICE U.S. Treasury 3-7 Year Bond Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes) | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [1] | 7.16% | 0.17% | 1.76% | ||
| iShares 3-7 Year Treasury Bond ETF | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 7.01% | 0.05% | 1.64% | |||
| Performance Inception Date | Jan. 05, 2007 | |||||
| iShares 3-7 Year Treasury Bond ETF | After Taxes on Distributions | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 5.50% | (0.85%) | 0.85% | |||
| iShares 3-7 Year Treasury Bond ETF | After Taxes on Distributions and Sales | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 4.13% | (0.35%) | 0.91% | |||
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