S000001266 [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 |
|
| U.S. GOVERNMENT MONEY MARKET FUND | U.S. GOVERNMENT MONEY MARKET FUND | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.02% | 4.98% | 4.81% | 1.24% | 0.01% | 0.31% | 1.94% | 1.53% | 0.57% | 0.06% |