State Street Emerging Markets Enhanced Index Portfolio Annual Total Returns |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| State Street Emerging Markets Enhanced Index Portfolio | Class A | ||||||
| Prospectus [Line Items] | ||||||
| Annual Return [Percent] | 34.45% | 11.41% | 12.80% | (20.13%) | 0.64% | 14.86% |