Class I [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 |
|
| Class I | UBS Ultra Short Income Fund | Class I | |||||||
| Prospectus [Line Items] | |||||||
| Annual Return [Percent] | 4.65% | 5.43% | 5.74% | (0.18%) | (0.02%) | 0.73% | 3.02% |