v3.26.1
Class Aand Class P [Member] Shareholder Fees - Class A and Class P - UBS Ultra Short Income Fund
Apr. 30, 2026
Class A  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% [1]
Exchange Fee (as a percentage of Amount Redeemed) 0.00%
Class P  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Exchange Fee (as a percentage of Amount Redeemed) 0.00%
[1]
Shares of the fund acquired through the exchange of shares of another Family Fund (“Family Funds” include PACE® Select funds, series of The UBS Funds and other funds for which UBS Asset Management (US) Inc. serves as principal underwriter) may be subject to a deferred sales charge if you later sell the fund shares acquired in the exchange, based on the terms of the shares of the Family Fund you originally held.