S000069558 [Member] Average Annual Total Returns |
12 Months Ended | 51 Months Ended | ||||
|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
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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 | [1] | 1.47% | (1.99%) | |||
| ICE BofA Long US Treasury Principal STRIPS Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [2] | (15.56%) | (17.18%) | |||
| iShares 25+ Year Treasury STRIPS Bond ETF | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | (15.74%) | (17.02%) | ||||
| Performance Inception Date | Sep. 22, 2020 | |||||
| iShares 25+ Year Treasury STRIPS Bond ETF | After Taxes on Distributions | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | (17.17%) | (18.06%) | ||||
| iShares 25+ Year Treasury STRIPS Bond ETF | After Taxes on Distributions and Sales | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | (9.24%) | (12.17%) | ||||
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