v3.26.1
FVM - Fair value hierarchy - Liabilities (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading $ 61,892 $ 53,700
Derivative financial liabilities 199,373 156,267
Brokerage payables designated at fair value 78,536 62,202
Debt issued designated at fair value 114,496 107,544
Other financial liabilities designated at fair value 37,335 35,287
Total financial liabilities measured at fair value through profit or loss 491,632 415,001
of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 40,592 32,734
of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 10,237 11,867
of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 8,815 6,901
of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 2,117 2,054
of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 57,279 49,918
of which: Interest rate    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 28,195 30,856
of which: Equity / index    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 101,802 62,620
of which: Credit    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 5,393 4,366
of which: Commodities    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 5,605 8,043
Loan commitments measured at FVTPL    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 37 33
of which: Financial liabilities related to unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 22,838 21,052
of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 4,259 3,848
of which: Funding from UBS Group AG    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 7,508 7,104
of which: Over-the-counter debt instruments and others    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 2,730 3,284
Level 1    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 48,719 39,315
Derivative financial liabilities 1,422 688
Brokerage payables designated at fair value 0 0
Debt issued designated at fair value 0 0
Other financial liabilities designated at fair value 0 0
Total financial liabilities measured at fair value through profit or loss 50,142 40,003
Level 1 | of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 40,116 32,533
Level 1 | of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 8 12
Level 1 | of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 6,725 4,894
Level 1 | of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 1,864 1,874
Level 1 | of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 427 346
Level 1 | of which: Interest rate    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 0 0
Level 1 | of which: Equity / index    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 0 0
Level 1 | of which: Credit    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 0 0
Level 1 | of which: Commodities    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 0 2
Level 1 | Loan commitments measured at FVTPL    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 0 0
Level 1 | of which: Financial liabilities related to unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 0 0
Level 1 | of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 0 0
Level 1 | of which: Funding from UBS Group AG    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 0 0
Level 1 | of which: Over-the-counter debt instruments and others    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 0 0
Level 2    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 13,120 14,278
Derivative financial liabilities 192,597 150,598
Brokerage payables designated at fair value 78,536 62,202
Debt issued designated at fair value 103,634 96,457
Other financial liabilities designated at fair value 34,406 32,047
Total financial liabilities measured at fair value through profit or loss 422,293 355,584
Level 2 | of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 427 135
Level 2 | of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 10,226 11,818
Level 2 | of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 2,091 2,007
Level 2 | of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 252 177
Level 2 | of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 56,751 49,496
Level 2 | of which: Interest rate    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 27,908 30,539
Level 2 | of which: Equity / index    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 97,427 58,396
Level 2 | of which: Credit    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 4,849 4,052
Level 2 | of which: Commodities    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 5,589 8,024
Level 2 | Loan commitments measured at FVTPL    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 8 6
Level 2 | of which: Financial liabilities related to unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 22,838 21,052
Level 2 | of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 3,816 3,389
Level 2 | of which: Funding from UBS Group AG    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 5,904 5,500
Level 2 | of which: Over-the-counter debt instruments and others    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 1,849 2,107
Level 3    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 53 107
Derivative financial liabilities 5,353 4,981
Brokerage payables designated at fair value 0 0
Debt issued designated at fair value 10,863 11,087
Other financial liabilities designated at fair value 2,928 3,240
Total financial liabilities measured at fair value through profit or loss 19,197 19,415
Level 3 | of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 48 65
Level 3 | of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 3 37
Level 3 | of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 0 0
Level 3 | of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Financial liabilities at fair value held for trading 1 3
Level 3 | of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 101 77
Level 3 | of which: Interest rate    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 287 317
Level 3 | of which: Equity / index    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 4,375 4,224
Level 3 | of which: Credit    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 544 314
Level 3 | of which: Commodities    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 16 16
Level 3 | Loan commitments measured at FVTPL    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Derivative financial liabilities 30 26
Level 3 | of which: Financial liabilities related to unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 0 0
Level 3 | of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 443 459
Level 3 | of which: Funding from UBS Group AG    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value 1,604 1,604
Level 3 | of which: Over-the-counter debt instruments and others    
Disclosure Of Fair Value Measurement Of Liabilities [Line Items]    
Other financial liabilities designated at fair value $ 881 $ 1,178