S000002880 [Member] Annual Fund Operating Expenses - BlackRock Equity Dividend V.I. Fund |
Dec. 31, 2025 |
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| Prospectus [Line Items] | ||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | June 30, 2027 | |||||||
| Class I | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | [1] | ||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||
| Other Expenses (as a percentage of Assets): | 0.27% | |||||||
| Acquired Fund Fees and Expenses | 0.01% | [2] | ||||||
| Expenses (as a percentage of Assets) | 0.88% | [2] | ||||||
| Fee Waiver or Reimbursement | (0.20%) | [1],[3] | ||||||
| Net Expenses (as a percentage of Assets) | 0.68% | [1],[3] | ||||||
| Class III | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | [1] | ||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||
| Other Expenses (as a percentage of Assets): | 0.27% | |||||||
| Acquired Fund Fees and Expenses | 0.01% | [2] | ||||||
| Expenses (as a percentage of Assets) | 1.13% | [2] | ||||||
| Fee Waiver or Reimbursement | (0.20%) | [1],[3] | ||||||
| Net Expenses (as a percentage of Assets) | 0.93% | [1],[3] | ||||||
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