State Street Total Return VIS Fund Expense Example - Combo [Member] - State Street Total Return VIS Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class 1 | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 72 |
| Expense Example, with Redemption, 3 Years | 224 |
| Expense Example, with Redemption, 5 Years | 390 |
| Expense Example, with Redemption, 10 Years | 871 |
| Class 3 | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 97 |
| Expense Example, with Redemption, 3 Years | 303 |
| Expense Example, with Redemption, 5 Years | 525 |
| Expense Example, with Redemption, 10 Years | $ 1,166 |