v3.26.1
S000091281 [Member] Annual Fund Operating Expenses - iShares S&P 500 3% Capped ETF
Mar. 31, 2026
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2031
iShares S&P 500 3% Capped ETF  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.15% [1]
Other Expenses (as a percentage of Assets): 0.00% [1]
Expenses (as a percentage of Assets) 0.15% [1]
Fee Waiver or Reimbursement (0.06%) [1]
Net Expenses (as a percentage of Assets) 0.09% [1]
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude acquired fund fees and expenses, if any.