S000004362 [Member] Average Annual Total Returns |
12 Months Ended | 54 Months Ended | 60 Months Ended | 74 Months Ended | 98 Months Ended | 120 Months Ended | 255 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
[2] | Dec. 31, 2024 |
Dec. 31, 2024 |
[3] | Dec. 31, 2024 |
[1] | Dec. 31, 2024 |
Dec. 31, 2024 |
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| Bloomberg U.S. Universal Index (Returns do not reflect deductions for fees, expenses or taxes) | |||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||
| Average Annual Return, Percent | 2.04% | [1] | (1.01%) | 0.06% | [1] | 1.79% | 1.35% | 1.73% | [4] | ||||||||||||
| Bloomberg U.S. Aggregate Bond Index (Returns do not reflect deductions for fees, expenses or taxes) | |||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||
| Average Annual Return, Percent | 1.25% | (0.33%) | 1.35% | ||||||||||||||||||
| iShares Core U.S. Aggregate Bond ETF | |||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||
| Average Annual Return, Percent | 1.37% | (0.34%) | 1.31% | ||||||||||||||||||
| Performance Inception Date | Sep. 22, 2003 | ||||||||||||||||||||
| iShares Core U.S. Aggregate Bond ETF | After Taxes on Distributions | |||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||
| Average Annual Return, Percent | (0.14%) | (1.40%) | 0.24% | ||||||||||||||||||
| iShares Core U.S. Aggregate Bond ETF | After Taxes on Distributions and Sales | |||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||
| Average Annual Return, Percent | 0.81% | (0.69%) | 0.54% | ||||||||||||||||||
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