v3.25.2
Expense Example - BlackRock Summit Cash Reserves Fund
Apr. 30, 2025
USD ($)
Investor A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 43 [1]
Expense Example, with Redemption, 3 Years 163 [1]
Expense Example, with Redemption, 5 Years 294 [1]
Expense Example, with Redemption, 10 Years 677 [1]
Investor C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 219 [2]
Expense Example, with Redemption, 3 Years 448 [2]
Expense Example, with Redemption, 5 Years 800 [2]
Expense Example, with Redemption, 10 Years 1,527 [2]
Institutional Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 43
Expense Example, with Redemption, 3 Years 165
Expense Example, with Redemption, 5 Years 299
Expense Example, with Redemption, 10 Years $ 688
[1] These expense figures do not reflect the imposition of the CDSC which may be deducted upon the redemption of Investor A Shares of the Fund received in an exchange transaction for Investor A Shares of an Investor A Load-Waived BlackRock Fund as described in the applicable prospectuses. No CDSC is deducted upon the redemption of Investor A Shares of the Fund that are not acquired by exchange.
[2] Reflects assessment of applicable CDSC assuming Investor C Shares were acquired by exchange from a Non-Money Market BlackRock Fund immediately after purchase of shares from such other fund.