v3.26.1
S000013702 [Member] Annual Fund Operating Expenses - iShares MBS ETF
Feb. 28, 2026
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination June 30, 2027
iShares MBS ETF  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.04% [1]
Other Expenses (as a percentage of Assets): 0.00% [1]
Expenses (as a percentage of Assets) 0.04% [1]
Fee Waiver or Reimbursement 0.00% [1]
Net Expenses (as a percentage of Assets) 0.04% [1]
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude acquired fund fees and expenses, if any.