State Street SP 500 Index VIS Fund Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| State Street SP 500 Index VIS Fund | Class 1 | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 17.52% | 24.63% | 25.96% | (18.31%) | 28.27% | 17.92% | 31.05% | (4.73%) | 21.50% | 11.61% |