S000017009 [Member] Expense Example - Franklin Multi-Asset Variable Conservative Growth |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 60 |
| Expense Example, with Redemption, 3 Years | 189 |
| Expense Example, with Redemption, 5 Years | 330 |
| Expense Example, with Redemption, 10 Years | 739 |
| Class II | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 86 |
| Expense Example, with Redemption, 3 Years | 268 |
| Expense Example, with Redemption, 5 Years | 466 |
| Expense Example, with Redemption, 10 Years | $ 1,038 |