v3.25.2
S000013702 [Member] Annual Fund Operating Expenses - iShares MBS ETF
Feb. 28, 2025
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination February 28, 2027
iShares MBS ETF  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.04% [1]
Distribution and Service (12b-1) Fees 0.00% [1]
Other Expenses (as a percentage of Assets): 0.00% [1],[2]
Expenses (as a percentage of Assets) 0.04% [1]
Fee Waiver or Reimbursement 0.00% [1],[2]
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.
[2] The amount rounded to 0.00%.