Investor A Institutional [Member] Annual Fund Operating Expenses - Investor A, Institutional - BlackRock Emerging Markets ex-China Fund |
Apr. 30, 2026 |
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| Prospectus [Line Items] | ||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | June 30, 2028 | |||||||||
| Investor A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Management Fees (as a percentage of Assets) | 0.81% | [1] | ||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||
| Other Expenses (as a percentage of Assets): | 2.67% | [2],[3] | ||||||||
| Acquired Fund Fees and Expenses | 0.01% | [3] | ||||||||
| Expenses (as a percentage of Assets) | 3.74% | [3] | ||||||||
| Fee Waiver or Reimbursement | (2.62%) | [1],[4] | ||||||||
| Net Expenses (as a percentage of Assets) | 1.12% | [1],[4] | ||||||||
| Institutional | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Management Fees (as a percentage of Assets) | 0.81% | [1] | ||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||
| Other Expenses (as a percentage of Assets): | 2.69% | [2],[3] | ||||||||
| Acquired Fund Fees and Expenses | 0.01% | [3] | ||||||||
| Expenses (as a percentage of Assets) | 3.51% | [3] | ||||||||
| Fee Waiver or Reimbursement | (2.64%) | [1],[4] | ||||||||
| Net Expenses (as a percentage of Assets) | 0.87% | [1],[4] | ||||||||
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