UBS Emerging Markets Equity Opportunity Fund (Class A, Class P) UBS GLOBAL ALLOCATION FUND UBS International Sustainable Aware Equity Fund (Class A, Class P) UBS Multi Income Bond Fund (Class A, Class P) UBS Sustainable Development Bank Bond Fund (Class A, Class P) UBS US Dividend Ruler Fund (Class P) UBS US Quality Growth At Reasonable Price Fund UBS Emerging Markets Equity Opportunity Fund - Class P2 Prospectus UBS International Sustainable Aware Equity Fund - Class P2 Prospectus UBS US Dividend Ruler Fund - Class P2 Prospectus UBS Multi Income Bond Fund - Class P2 Prospectus UBS Sustainable Development Bank Bond Fund - Class P2 Prospectus UBS Emerging Markets Equity Opportunity Fund UBS GLOBAL ALLOCATION FUND UBS International Sustainable Aware Equity Fund UBS Multi Income Bond Fund UBS Sustainable Development Bank Bond Fund UBS US Dividend Ruler Fund UBS US Quality Growth At Reasonable Price Fund CLASS A CLASS P CLASS A CLASS P CLASS A CLASS P Class A Class P Class A Class P Class P Class P CLASS P2 Class P2 Class P2 Class P2 Class P2 Risks of development bank bonds [Member] Emerging market risk [Member] High yield securities (“junk bonds”) risk [Member] Foreign investing risk [Member] Model and data risk [Member] Asset allocation risk [Member] Concentration risk [Member] Focus risk [Member] Financials sector risk [Member] Information technology sector risk [Member] China risk [Member] Sustainability factor risk [Member] China A-shares and Stock Connect investing risk [Member] Initial public offerings (“IPOs”)/private placement risk [Member] Small- and mid-capitalization risk [Member] Sovereign debt risk [Member] US Government securities risk [Member] IPOs risk [Member] Liquidity risk [Member] Mortgage- and asset-backed securities risk [Member] Prepayment or call risk [Member] Floating or variable rate securities risk [Member] Equity risk [Member] Municipal securities risk [Member] Market risk [Member] Investment style risk [Member] Dividend paying stock risk [Member] Portfolio turnover risk [Member] Leverage risk associated with financial instruments [Member] Derivatives risk [Member] Investing in other funds risk [Member] Real estate securities and REITs risk [Member] Management risk [Member] Interest Rate Risk [Member] Credit Risk [Member] Geographic Concentration Risk [Member] MSCI Emerging Markets Index (net) MSCI All Country World Index (net) FTSE World Government Bond Index (Hedged in USD) 60% MSCI All Country World Index (net)/40% FTSE World Government Bond Index (Hedged in USD) MSCI World ex-USA Index Net (USD) Bloomberg US Aggregate Bond Index Bloomberg U.S. Treasury Index Solactive Global Multilateral Development Bank Bond USD 40% 1‑5 Year 60% 5‑10 Year Total Return Index S&P 500 Index Russell 1000 Growth Index MSCI World ex-US Index C000220415 Member index_ SP_500_ Index Member C000241422 Member CreditRiskMember doc_ UBS_ International_ Sustainable_ Aware_ Equity_ Fund_ Class_ A_ Class_ PMember Management Risk Member C000008499 Member index_ MSCI_ All_ Country_ World_ Index_net Member Investment Style Risk Member USGovernment Securities Risk Member doc_ UBS_ Emerging_ Markets_ Equity_ Opportunity_ Fund_ Class_ A_ Class_ PMember S000063382 Member index_ Russell_1000_ Growth_ Index Member Foreign Investing Risk Member C000205445 Member Sovereign Debt Risk Member C000166870 Member Real Estate Securities And REITs Risk Member Model And Data Risk Member Information Technology Sector Risk Member doc_ UBS_ US_ Dividend_ Ruler_ Fund_ Class_ P2_ Prospectus Member S000068969 Member C000220414 Member Portfolio Turnover Risk Member Risks Of Development Bank Bonds Member index_ MSCI_ World_ex USA_ Index_ Net_ USDMember C000205444 Member Derivatives Risk Member Floating Or Variable Rate Securities Risk Member C000008186 Member IPOs Risk Member Equity Risk Member Initial Public Offerings IPOsprivate Placement Risk Member S000068970 Member S000002979 Member doc_ UBS_ Emerging_ Markets_ Equity_ Opportunity_ Fund_ Class_ P2_ Prospectus Member Small And Midcapitalization Risk Member S000003134 Member Focus Risk Member C000008502 Member C000008189 Member Emerging Market Risk Member doc_ UBS_ International_ Sustainable_ Aware_ Equity_ Fund_ Class_ P2_ Prospectus Member China Ashares And Stock Connect Investing Risk Member Asset Allocation Risk Member C000205443 Member index_ MSCI_ Emerging_ Markets_ Index_net Member C000008182 Member Investing In Other Funds Risk Member C000200986 Member Financials Sector Risk Member index_ Bloomberg_ US_ Treasury_ Index Member C000222877 Member Dividend Paying Stock Risk Member doc_ UBS_ Multi_ Income_ Bond_ Fund_ Class_ A_ Class_ PMember Municipal Securities Risk Member High Yield Securitiesjunk Bonds Risk Member doc_ UBS_ Multi_ Income_ Bond_ Fund_ Class_ P2_ Prospectus Member doc_ UBS_ GLOBAL_ ALLOCATION_ FUNDMember doc_ UBS_ US_ Quality_ Growth_ At_ Reasonable_ Price_ Fund Member doc_ UBS_ Sustainable_ Development_ Bank_ Bond_ Fund_ Class_ A_ Class_ PMember S000002980 Member Concentration Risk Member index_ FTSE_ World_ Government_ Bond_ Index_ Hedged_in_ USDMember C000008185 Member C000166868 Member Liquidity Risk Member doc_ UBS_ US_ Dividend_ Ruler_ Fund_ Class_ PMember GeographicConcentrationRiskMember Market Risk Member C000237722 Member Mortgage And Assetbacked Securities Risk Member index_ Bloomberg_ US_ Aggregate_ Bond_ Index Member doc_ UBS_ Sustainable_ Development_ Bank_ Bond_ Fund_ Class_ P2_ Prospectus Member InterestRateRiskMember index_ MSCI_ World_ex US_ Index Member index_ Solactive_ Global_ Multilateral_ Development_ Bank_ Bond_ USD_40_15_ Year_60_510_ Year_ Total_ Return_ Index Member Leverage Risk Associated With Financial Instruments Member China Risk Member index_60_ MSCI_ All_ Country_ World_ Index_net40_ FTSE_ World_ Government_ Bond_ Index_ Hedged_in_ USDMember S000053041 Member Sustainability Factor Risk Member Prepayment Or Call Risk Member