S000052306 [Member] Average Annual Total Returns - UBS Prime Reserves Fund |
12 Months Ended | 60 Months Ended | 107 Months Ended |
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.21% | 2.48% | 1.99% |
| Performance Inception Date | Jan. 19, 2016 |