S000053132 [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 |
|
| UBS Select Government Preferred Fund | UBS Select Government Preferred Fund | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | 4.16% | 5.14% | 5.02% | 1.56% | 0.01% | 0.41% | 2.12% | 1.73% | 0.78% |