Investor A and Institutional [Member] Annual Fund Operating Expenses - Investor A, Institutional - BlackRock Sustainable Aware Advantage Emerging Markets Equity Fund |
Apr. 30, 2026 |
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| Prospectus [Line Items] | ||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | June 30, 2028 | |||||||
| Institutional | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.80% | [1] | ||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||
| Other Expenses (as a percentage of Assets): | 2.90% | [2] | ||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||
| Expenses (as a percentage of Assets) | 3.71% | [2] | ||||||
| Fee Waiver or Reimbursement | (2.84%) | [1],[3] | ||||||
| Net Expenses (as a percentage of Assets) | 0.87% | [1],[3] | ||||||
| Investor A | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.80% | [1] | ||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||
| Other Expenses (as a percentage of Assets): | 2.95% | [2] | ||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||
| Expenses (as a percentage of Assets) | 4.01% | [2] | ||||||
| Fee Waiver or Reimbursement | (2.89%) | [1],[3] | ||||||
| Net Expenses (as a percentage of Assets) | 1.12% | [1],[3] | ||||||
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