S000017010 [Member] Expense Example, No Redemption - Franklin Multi-Asset Variable Moderate Growth |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 78 |
| Expense Example, No Redemption, 3 Years | 267 |
| Expense Example, No Redemption, 5 Years | 472 |
| Expense Example, No Redemption, 10 Years | 1,063 |
| Class II | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 103 |
| Expense Example, No Redemption, 3 Years | 345 |
| Expense Example, No Redemption, 5 Years | 606 |
| Expense Example, No Redemption, 10 Years | $ 1,353 |