Class A and Class P [Member] Annual Total Returns |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Class A and Class P | UBS Ultra Short Income Fund | Class A | ||||||
| Prospectus [Line Items] | ||||||
| Annual Return [Percent] | 5.31% | 5.61% | (0.19%) | (0.14%) | 0.81% | 2.79% |