v3.26.1
S000069558 [Member] Annual Fund Operating Expenses - iShares 25+ Year Treasury STRIPS Bond ETF
Feb. 28, 2026
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination February 28, 2029
iShares 25+ Year Treasury STRIPS Bond 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 (0.05%) [1]
Net Expenses (as a percentage of Assets) 0.10% [1]
[1] Operating expenses paid by BFA under the Investment Advisory Agreement exclude acquired fund fees and expenses, if any.