Annual Fund Operating Expenses - BlackRock U.S. Mortgage Portfolio |
Apr. 30, 2025 |
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Prospectus [Line Items] | ||||||
Fee Waiver or Reimbursement over Assets, Date of Termination | June 30, 2027 | |||||
Investor A Shares | ||||||
Prospectus [Line Items] | ||||||
Management Fees (as a percentage of Assets) | 0.40% | [1] | ||||
Distribution and Service (12b-1) Fees | 0.25% | |||||
Other Expenses (as a percentage of Assets): | 0.19% | |||||
Expenses (as a percentage of Assets) | 0.84% | |||||
Fee Waiver or Reimbursement | (0.14%) | [1],[2] | ||||
Net Expenses (as a percentage of Assets) | 0.70% | [1],[2] | ||||
Investor C Shares | ||||||
Prospectus [Line Items] | ||||||
Management Fees (as a percentage of Assets) | 0.40% | [1] | ||||
Distribution and Service (12b-1) Fees | 1.00% | |||||
Other Expenses (as a percentage of Assets): | 0.21% | |||||
Expenses (as a percentage of Assets) | 1.61% | |||||
Fee Waiver or Reimbursement | (0.16%) | [1],[2] | ||||
Net Expenses (as a percentage of Assets) | 1.45% | [1],[2] | ||||
Institutional Shares | ||||||
Prospectus [Line Items] | ||||||
Management Fees (as a percentage of Assets) | 0.40% | [1] | ||||
Distribution and Service (12b-1) Fees | 0.00% | |||||
Other Expenses (as a percentage of Assets): | 0.15% | |||||
Expenses (as a percentage of Assets) | 0.55% | |||||
Fee Waiver or Reimbursement | (0.10%) | [1],[2] | ||||
Net Expenses (as a percentage of Assets) | 0.45% | [1],[2] | ||||
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