S000045356 [Member] Expense Example - BlackRock 60/40 Target Allocation ETF V.I. Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 34 |
| Expense Example, with Redemption, 3 Years | 150 |
| Expense Example, with Redemption, 5 Years | 276 |
| Expense Example, with Redemption, 10 Years | 646 |
| Class III | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 59 |
| Expense Example, with Redemption, 3 Years | 231 |
| Expense Example, with Redemption, 5 Years | 418 |
| Expense Example, with Redemption, 10 Years | $ 958 |