SCB Classand Advisor Class [Member] 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 |
|
| Institutional | International Strategic Equities Portfolio | SCB Class | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 42.67% | 12.51% | 13.22% | (17.79%) | 10.04% | 4.19% | 19.62% | (15.24%) | 29.72% | 2.23% |