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S000093347 [Member] Annual Fund Operating Expenses - iShares S&P 500 ex S&P 100 ETF - iShares S&P 500 ex S&P 100 ETF
Mar. 31, 2026
 [1]
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.20%
Other Expenses (as a percentage of Assets): 0.00%
Expenses (as a percentage of Assets) 0.20%
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude acquired fund fees and expenses, if any.