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 Small Cap Portfolio | SCB Class | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 34.55% | 7.42% | 12.79% | (21.02%) | 12.20% | 7.89% | 19.08% | (17.99%) | 31.84% | 2.77% |