v3.26.1
Annual Fund Operating Expenses - BLACKROCK SELECT TREASURY BASED LIQUIDITY FUND
Apr. 30, 2026
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination June 30, 2028
OnChain Shares  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.20%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01% [1]
Expenses (as a percentage of Assets) 0.21%
Fee Waiver or Reimbursement (0.04%) [2]
Net Expenses (as a percentage of Assets) 0.17% [2]
[1]
Other Expenses are based on estimated amounts for the Fund’s current fiscal year.
[2]
As described in the “Management of the Fund” section of the Fund’s prospectus beginning on page 23, BlackRock, the Fund’s investment manager, has contractually agreed to waive fees and/or reimburse ordinary operating expenses in order to keep combined Management Fees and Miscellaneous/Other Expenses (excluding Dividend Expense, Interest Expense, Acquired Fund Fees and Expenses and certain other Fund expenses) from exceeding 0.17% of average daily net assets through June 30, 2028. The contractual agreement may be terminated upon 90 days’ notice by a majority of the non‑interested trustees of the Trust or by a vote of a majority of the outstanding voting securities of the Fund.