Annual Total Returns |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Morgan Stanley U.S. Government Money Market Trust - Classes R and S | U.S. Government Money Market Trust | R | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.00% | 4.97% | 4.83% | 1.36% | 0.01% | 0.29% | 1.92% | 1.52% | 0.45% | 0.01% |