v3.26.1
S000057567 [Member] Annual Fund Operating Expenses - iShares Russell 2500 ETF - iShares Russell 2500 ETF
Mar. 31, 2026
 [1]
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.15%
Other Expenses (as a percentage of Assets): 0.00%
Acquired Fund Fees and Expenses 0.08%
Expenses (as a percentage of Assets) 0.23%
Fee Waiver or Reimbursement (0.08%)
Net Expenses (as a percentage of Assets) 0.15%
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude Acquired Fund Fees and Expenses, if any.