S000001112 [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 |
|
| Government Portfolio | Government Portfolio | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.28% | 5.23% | 5.05% | 1.53% | 0.02% | 0.43% | 2.16% | 1.78% | 0.79% | 0.22% |