S000069558 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 63 Months Ended | ||
|---|---|---|---|---|---|
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%) | (0.32%) | ||
| ICE BofA Long US Treasury Principal STRIPS Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes) | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | (1.92%) | (14.31%) | (14.48%) | |
| iShares 25+ Year Treasury STRIPS Bond ETF | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | (1.90%) | (14.19%) | (14.35%) | ||
| Performance Inception Date | Sep. 22, 2020 | ||||
| iShares 25+ Year Treasury STRIPS Bond ETF | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | (3.79%) | (15.42%) | (15.53%) | ||
| iShares 25+ Year Treasury STRIPS Bond ETF | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | (1.10%) | (10.26%) | (10.27%) | ||
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