v3.26.1
FVM - Fair value hierarchy - Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading $ 179,195 $ 174,699
Derivative financial instruments 193,158 147,778
Brokerage receivables 44,704 35,579
Financial assets at fair value not held for trading 113,987 107,575
Financial assets measured at fair value through other comprehensive income 14,517 13,868
Precious metals and other physical commodities 12,287 12,996
Other non-financial assets measured at fair value 58 62
Total assets measured at fair value 557,905 492,557
of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 129,234 128,144
Financial assets at fair value not held for trading 2,124 2,182
of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 13,361 11,168
Financial assets at fair value not held for trading 31,895 32,355
Financial assets measured at fair value through other comprehensive income 12,409 11,659
of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 11,032 9,677
Financial assets at fair value not held for trading 1,907 1,539
of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 21,154 22,449
Financial assets at fair value not held for trading 19,944 17,026
Financial assets measured at fair value through other comprehensive income 292 265
of which: Loans    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 3,660 2,814
Financial assets at fair value not held for trading 10,718 9,987
of which: Asset-backed securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 383 447
Financial assets at fair value not held for trading 1,756 1,482
of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 62,198 48,655
of which: Interest rate    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 33,304 34,789
of which: Equity / index    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 85,614 50,814
of which: Credit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 4,350 3,910
of which: Commodities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 6,601 9,247
of which: Auction rate securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 0 191
of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 22,724 21,490
of which: Financial assets for unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 22,694 20,922
of which: Commercial paper and certificates of deposit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets measured at fair value through other comprehensive income 1,817 1,944
Level 1    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 146,714 143,009
Derivative financial instruments 1,369 581
Brokerage receivables 0 0
Financial assets at fair value not held for trading 49,279 47,564
Financial assets measured at fair value through other comprehensive income 12,266 11,735
Precious metals and other physical commodities 12,287 12,996
Other non-financial assets measured at fair value 0 0
Total assets measured at fair value 221,915 215,886
Level 1 | of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 128,278 127,455
Financial assets at fair value not held for trading 31 100
Level 1 | of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 8,685 6,868
Financial assets at fair value not held for trading 25,328 26,208
Financial assets measured at fair value through other comprehensive income 12,162 11,659
Level 1 | of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 9,651 8,319
Financial assets at fair value not held for trading 1,123 480
Level 1 | of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 100 367
Financial assets at fair value not held for trading 164 0
Financial assets measured at fair value through other comprehensive income 104 76
Level 1 | of which: Loans    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 0 0
Financial assets at fair value not held for trading 0 0
Level 1 | of which: Asset-backed securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 1 0
Financial assets at fair value not held for trading 0 0
Level 1 | of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 404 293
Level 1 | of which: Interest rate    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 0 0
Level 1 | of which: Equity / index    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 0 0
Level 1 | of which: Credit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 0 0
Level 1 | of which: Commodities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 0 3
Level 1 | of which: Auction rate securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 0 0
Level 1 | of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 0 0
Level 1 | of which: Financial assets for unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 22,633 20,776
Level 1 | of which: Commercial paper and certificates of deposit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets measured at fair value through other comprehensive income 0 0
Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 29,092 29,358
Derivative financial instruments 188,983 143,966
Brokerage receivables 44,704 35,579
Financial assets at fair value not held for trading 54,958 51,097
Financial assets measured at fair value through other comprehensive income 2,251 2,133
Precious metals and other physical commodities 0 0
Other non-financial assets measured at fair value 0 0
Total assets measured at fair value 319,988 262,133
Level 2 | of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 761 538
Financial assets at fair value not held for trading 0 0
Level 2 | of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 4,675 4,298
Financial assets at fair value not held for trading 6,567 6,147
Financial assets measured at fair value through other comprehensive income 246 0
Level 2 | of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 1,238 1,287
Financial assets at fair value not held for trading 186 381
Level 2 | of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 19,913 21,208
Financial assets at fair value not held for trading 19,617 16,936
Financial assets measured at fair value through other comprehensive income 188 189
Level 2 | of which: Loans    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 2,242 1,703
Financial assets at fair value not held for trading 5,296 5,760
Level 2 | of which: Asset-backed securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 262 324
Financial assets at fair value not held for trading 1,325 1,002
Level 2 | of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 61,457 48,056
Level 2 | of which: Interest rate    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 32,492 33,631
Level 2 | of which: Equity / index    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 84,356 49,379
Level 2 | of which: Credit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 3,956 3,587
Level 2 | of which: Commodities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 6,599 9,239
Level 2 | of which: Auction rate securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 0 0
Level 2 | of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 21,755 20,553
Level 2 | of which: Financial assets for unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 61 145
Level 2 | of which: Commercial paper and certificates of deposit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets measured at fair value through other comprehensive income 1,817 1,944
Level 3    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 3,389 2,333
Derivative financial instruments 2,806 3,230
Brokerage receivables 0 0
Financial assets at fair value not held for trading 9,750 8,913
Financial assets measured at fair value through other comprehensive income 0 0
Precious metals and other physical commodities 0 0
Other non-financial assets measured at fair value 58 62
Total assets measured at fair value 16,002 14,538
Level 3 | of which: Equity instruments    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 196 151
Financial assets at fair value not held for trading 2,093 2,082
Level 3 | of which: Government bills / bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 1 2
Financial assets at fair value not held for trading 0 0
Financial assets measured at fair value through other comprehensive income 0 0
Level 3 | of which: Investment fund units    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 143 71
Financial assets at fair value not held for trading 598 678
Level 3 | of which: Corporate and municipal bonds    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 1,141 874
Financial assets at fair value not held for trading 163 89
Financial assets measured at fair value through other comprehensive income 0 0
Level 3 | of which: Loans    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 1,417 1,111
Financial assets at fair value not held for trading 5,422 4,226
Level 3 | of which: Asset-backed securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value held for trading 120 123
Financial assets at fair value not held for trading 431 480
Level 3 | of which: Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 337 306
Level 3 | of which: Interest rate    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 813 1,159
Level 3 | of which: Equity / index    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 1,258 1,435
Level 3 | of which: Credit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 395 323
Level 3 | of which: Commodities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Derivative financial instruments 2 5
Level 3 | of which: Auction rate securities    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 0 191
Level 3 | of which: Securities financing transactions    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 968 937
Level 3 | of which: Financial assets for unit-linked investment contracts    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets at fair value not held for trading 0 0
Level 3 | of which: Commercial paper and certificates of deposit    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets measured at fair value through other comprehensive income $ 0 $ 0