S000053131 [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 Institutional Fund | UBS Select Government Institutional Fund | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | 4.11% | 5.10% | 4.97% | 1.53% | 0.01% | 0.38% | 2.08% | 1.69% | 0.74% |