Service and Premier Shares [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 |
|
| Service and Premier Shares [Member] | TREASURY PORTFOLIO | Premier Shares | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | 4.13% | 5.11% | 4.94% | 1.34% | 0.01% | 0.37% | 2.07% | 1.68% | 0.72% |