S000062377 [Member] Expense Example - BlackRock Total Return V.I. Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 44 |
| Expense Example, with Redemption, 3 Years | 175 |
| Expense Example, with Redemption, 5 Years | 318 |
| Expense Example, with Redemption, 10 Years | 734 |
| Class III | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 76 |
| Expense Example, with Redemption, 3 Years | 252 |
| Expense Example, with Redemption, 5 Years | 443 |
| Expense Example, with Redemption, 10 Years | $ 995 |