S000017011 [Member] Expense Example - Franklin Multi-Asset Variable Growth |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 80 |
| Expense Example, with Redemption, 3 Years | 250 |
| Expense Example, with Redemption, 5 Years | 434 |
| Expense Example, with Redemption, 10 Years | 967 |
| Class II | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 105 |
| Expense Example, with Redemption, 3 Years | 328 |
| Expense Example, with Redemption, 5 Years | 569 |
| Expense Example, with Redemption, 10 Years | $ 1,260 |