v3.26.1
S000069532 [Member] Annual Fund Operating Expenses - iShares ESG Select Screened S&P 500 ETF - iShares ESG Select Screened S&P 500 ETF
Mar. 31, 2026
 [1]
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.08%
Other Expenses (as a percentage of Assets): 0.00%
Expenses (as a percentage of Assets) 0.08%
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude acquired fund fees and expenses, if any.