v3.26.3
Average Annual Total Returns
 12 Months Ended 27 Months Ended 34 Months Ended 60 Months Ended 62 Months Ended 66 Months Ended 83 Months Ended 86 Months Ended 91 Months Ended 111 Months Ended 120 Months Ended 636 Months Ended
Oct. 27, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
 [1]
UBS Emerging Markets Equity Opportunity Fund (Class A, Class P) | CLASS P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   42.69%     0.91%     5.81%          
Performance Inception Date Jan. 31, 2019                        
UBS Emerging Markets Equity Opportunity Fund (Class A, Class P) | CLASS P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   42.17%     0.07%     5.07%          
UBS Emerging Markets Equity Opportunity Fund (Class A, Class P) | CLASS P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   25.88%     0.65%     4.56%          
UBS Emerging Markets Equity Opportunity Fund (Class A, Class P) | MSCI Emerging Markets Index (net)                          
Prospectus [Line Items]                          
Average Annual Return, Percent   33.57%     4.20%     6.86%          
UBS GLOBAL ALLOCATION FUND | CLASS A                          
Prospectus [Line Items]                          
Average Annual Return, Percent   12.22%     3.55%             5.77%  
Performance Inception Date Jun. 30, 1997                        
UBS GLOBAL ALLOCATION FUND | CLASS P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   19.03%     5.00%             6.63%  
Performance Inception Date Aug. 31, 1992                        
UBS GLOBAL ALLOCATION FUND | CLASS P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   18.10%     3.21%             5.32%  
UBS GLOBAL ALLOCATION FUND | CLASS P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   11.33%     3.29%             4.87%  
UBS GLOBAL ALLOCATION FUND | MSCI All Country World Index (net)                          
Prospectus [Line Items]                          
Average Annual Return, Percent   22.34%     11.19%             11.72%  
UBS GLOBAL ALLOCATION FUND | FTSE World Government Bond Index (Hedged in USD)                          
Prospectus [Line Items]                          
Average Annual Return, Percent   3.79%     (0.76%)             1.80%  
UBS GLOBAL ALLOCATION FUND | 60% MSCI All Country World Index (net)/40% FTSE World Government Bond Index (Hedged in USD)                          
Prospectus [Line Items]                          
Average Annual Return, Percent   14.68%     6.42%             7.90%  
UBS International Sustainable Aware Equity Fund (Class A, Class P) | CLASS A                          
Prospectus [Line Items]                          
Average Annual Return, Percent   21.79%     5.65%             6.91%  
Performance Inception Date Jun. 30, 1997                        
UBS International Sustainable Aware Equity Fund (Class A, Class P) | CLASS P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   29.10%     7.11%             7.79%  
Performance Inception Date Aug. 31, 1993                        
UBS International Sustainable Aware Equity Fund (Class A, Class P) | CLASS P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   28.77%     5.87%             7.02%  
UBS International Sustainable Aware Equity Fund (Class A, Class P) | CLASS P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   17.90%     5.36%             6.22%  
UBS International Sustainable Aware Equity Fund (Class A, Class P) | MSCI World ex-USA Index Net (USD)                          
Prospectus [Line Items]                          
Average Annual Return, Percent   31.85%     9.46%             8.55%  
UBS Multi Income Bond Fund (Class A, Class P) | Class A                          
Prospectus [Line Items]                          
Average Annual Return, Percent   2.85%     (0.80%)           1.18%    
Performance Inception Date Sep. 29, 2016                        
UBS Multi Income Bond Fund (Class A, Class P) | Class P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.07%     0.19%             2.29%  
Performance Inception Date Dec. 19, 1972                        
UBS Multi Income Bond Fund (Class A, Class P) | Class P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   5.05%     (1.22%)             1.01%  
UBS Multi Income Bond Fund (Class A, Class P) | Class P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   4.14%     (0.47%)             1.19%  
UBS Multi Income Bond Fund (Class A, Class P) | Bloomberg US Aggregate Bond Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.30%     (0.36%)             2.01%
UBS Sustainable Development Bank Bond Fund (Class A, Class P) | Class P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.24%     (0.10%)       2.08%        
Performance Inception Date Oct. 24, 2018                        
UBS Sustainable Development Bank Bond Fund (Class A, Class P) | Class P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   5.76%     (0.97%)       1.07%        
UBS Sustainable Development Bank Bond Fund (Class A, Class P) | Class P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   4.26%     (0.45%)       1.18%        
UBS Sustainable Development Bank Bond Fund (Class A, Class P) | Bloomberg US Aggregate Bond Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.30%     (0.36%)       2.24%        
UBS Sustainable Development Bank Bond Fund (Class A, Class P) | Bloomberg U.S. Treasury Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   6.32%     (0.99%)       1.71%        
UBS Sustainable Development Bank Bond Fund (Class A, Class P) | Solactive Global Multilateral Development Bank Bond USD 40% 1‑5 Year 60% 5‑10 Year Total Return Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.36%     0.11%       2.30%        
UBS US Dividend Ruler Fund (Class P) | Class P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   16.63%     12.96%   14.71%            
Performance Inception Date Jul. 09, 2020                        
UBS US Dividend Ruler Fund (Class P) | Class P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   14.60%     11.75%   13.53%            
UBS US Dividend Ruler Fund (Class P) | Class P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   11.26%     10.11%   11.63%            
UBS US Dividend Ruler Fund (Class P) | S&P 500 Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   17.88%     14.42%   16.93%            
UBS US Quality Growth At Reasonable Price Fund | Class P                          
Prospectus [Line Items]                          
Average Annual Return, Percent   15.63%     13.53%   15.11%            
Performance Inception Date Jul. 09, 2020                        
UBS US Quality Growth At Reasonable Price Fund | Class P | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   13.98%     12.68%   14.30%            
UBS US Quality Growth At Reasonable Price Fund | Class P | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   10.36%     10.66%   12.05%            
UBS US Quality Growth At Reasonable Price Fund | S&P 500 Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   17.88%     14.42%   16.93%            
UBS US Quality Growth At Reasonable Price Fund | Russell 1000 Growth Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   18.70%     15.35%   17.79%            
UBS Emerging Markets Equity Opportunity Fund - Class P2 Prospectus | CLASS P2                          
Prospectus [Line Items]                          
Average Annual Return, Percent   43.81%     1.71%         4.56%      
Performance Inception Date Jun. 04, 2018                        
UBS Emerging Markets Equity Opportunity Fund - Class P2 Prospectus | CLASS P2 | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   43.31%     0.64%         3.71%      
UBS Emerging Markets Equity Opportunity Fund - Class P2 Prospectus | CLASS P2 | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   26.54%     1.16%         3.48%      
UBS Emerging Markets Equity Opportunity Fund - Class P2 Prospectus | MSCI Emerging Markets Index (net)                          
Prospectus [Line Items]                          
Average Annual Return, Percent   33.57%     4.20%         5.26%      
UBS International Sustainable Aware Equity Fund - Class P2 Prospectus | Class P2                          
Prospectus [Line Items]                          
Average Annual Return, Percent   30.19%     7.94% 11.39%              
Performance Inception Date Oct. 30, 2020                        
UBS International Sustainable Aware Equity Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   29.87%     6.53% 9.94%              
UBS International Sustainable Aware Equity Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   18.54%     5.94% 8.79%              
UBS International Sustainable Aware Equity Fund - Class P2 Prospectus | MSCI World ex-US Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   31.85%     9.46% 13.16%              
UBS US Dividend Ruler Fund - Class P2 Prospectus | Class P2                          
Prospectus [Line Items]                          
Average Annual Return, Percent   17.09%   19.94%                  
Performance Inception Date Mar. 15, 2023                        
UBS US Dividend Ruler Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   15.07%   18.17%                  
UBS US Dividend Ruler Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   11.53%   15.40%                  
UBS US Dividend Ruler Fund - Class P2 Prospectus | S&P 500 Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   17.88%   24.09%                  
UBS Multi Income Bond Fund - Class P2 Prospectus | Class P2                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.64% 7.50%                    
Performance Inception Date Oct. 11, 2023                        
UBS Multi Income Bond Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   5.65% 5.56%                    
UBS Multi Income Bond Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   4.47% 4.91%                    
UBS Multi Income Bond Fund - Class P2 Prospectus | Bloomberg US Aggregate Bond Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.30% 6.85%                    
UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus | Class P2                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.30%     0.02% 0.08%              
Performance Inception Date Oct. 30, 2020                        
UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions                          
Prospectus [Line Items]                          
Average Annual Return, Percent   5.75%     (0.92%) (1.00%)              
UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus | Class P2 | After Taxes on Distributions and Sales                          
Prospectus [Line Items]                          
Average Annual Return, Percent   4.30%     (0.39%) (0.37%)              
UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus | Bloomberg US Aggregate Bond Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.30%     (0.36%) (0.14%)              
UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus | Bloomberg U.S. Treasury Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent (0.94%) 6.32%     (0.99%)                
UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus | Solactive Global Multilateral Development Bank Bond USD 40% 1‑5 Year 60% 5‑10 Year Total Return Index                          
Prospectus [Line Items]                          
Average Annual Return, Percent   7.36%     0.11% 0.16%              
[1] Average annual total returns for the Bloomberg US Aggregate Bond Index for the life of Class A were 1.53%.