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S000068817 [Member] Annual Fund Operating Expenses - iShares ESG Advanced Total USD Bond Market ETF
 56 Months Ended
Feb. 28, 2025
Feb. 28, 2025
Prospectus [Line Items]    
Fee Waiver or Reimbursement over Assets, Date of Termination   June 30, 2030
iShares ESG Advanced Total USD Bond Market ETF    
Prospectus [Line Items]    
Management Fees (as a percentage of Assets) [1] 0.12%  
Distribution and Service (12b-1) Fees [1] 0.00%  
Other Expenses (as a percentage of Assets): [1],[2] 0.00%  
Acquired Fund Fees and Expenses [1],[2] 0.00%  
Expenses (as a percentage of Assets) [1] 0.12%  
Fee Waiver or Reimbursement [1],[2] 0.00%  
Net Expenses (as a percentage of Assets) [1] 0.12%  
[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%.