S000080646 [Member] Average Annual Total Returns |
12 Months Ended | 18 Months Ended | ||||
|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
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| S&P 500 Index (Index returns do not reflect deductions for fees, expenses or taxes) | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [1] | 25.02% | 23.47% | |||
| iShares Large Cap Deep Buffer ETF | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 18.66% | 14.74% | ||||
| Performance Inception Date | Jun. 28, 2023 | |||||
| iShares Large Cap Deep Buffer ETF | After Taxes on Distributions | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [2] | 18.24% | 14.48% | |||
| Performance Inception Date | [2] | Jun. 28, 2023 | ||||
| iShares Large Cap Deep Buffer ETF | After Taxes on Distributions and Sales | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [2] | 11.05% | 11.21% | |||
| Performance Inception Date | [2] | Jun. 28, 2023 | ||||
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