Average Annual Total Returns |
12 Months Ended | 46 Months Ended | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
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Bloomberg Municipal Bond Index (Index returns do not reflect deductions for fees, expenses or taxes) | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | [1],[2] | 1.05% | 0.01% | |||||||||||||||
New Customized Benchmark (Index returns do not reflect deductions for fees, expenses or taxes) | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | [3],[4] | |||||||||||||||||
Bloomberg Municipal High Yield Bond Index (Index returns do not reflect deductions for fees, expenses or taxes) | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | [5] | 6.32% | 1.70% | |||||||||||||||
Former Bloomberg Custom Blend Benchmark (Index returns do not reflect deductions for fees, expenses or taxes) | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | [6],[7] | 5.51% | 1.47% | |||||||||||||||
iShares High Yield Muni Income Active ETF | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | 6.83% | 1.44% | ||||||||||||||||
Performance Inception Date | Mar. 16, 2021 | |||||||||||||||||
iShares High Yield Muni Income Active ETF | After Taxes on Distributions | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | [8] | 6.79% | 1.32% | |||||||||||||||
Performance Inception Date | [8] | Mar. 16, 2021 | ||||||||||||||||
iShares High Yield Muni Income Active ETF | After Taxes on Distributions and Sales | ||||||||||||||||||
Prospectus [Line Items] | ||||||||||||||||||
Average Annual Return, Percent | [8] | 5.85% | 1.90% | |||||||||||||||
Performance Inception Date | [8] | Mar. 16, 2021 | ||||||||||||||||
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