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S000004436 [Member] Annual Fund Operating Expenses - iShares ESG Optimized MSCI USA ETF - iShares ESG Optimized MSCI USA ETF
Apr. 30, 2025
 [1]
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.25%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.00% [2]
Expenses (as a percentage of Assets) 0.25%
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude acquired fund fees and expenses, if any.
[2] The amount rounded to 0.00%.