v3.26.1
Segment reporting (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure Of Operating Segments [Line Items]      
Net interest income $ 4,718 $ 3,595  
Non-interest income 23,225 21,074  
Total revenues 27,943 24,668  
Credit loss expense / (release) 191 263  
Operating expenses 20,319 20,080  
Operating profit / (loss) before tax 7,434 4,325  
Tax expense / (benefit) 1,568 221  
Net profit / (loss) 5,866 4,105  
Additional information      
Total assets 1,707,284   $ 1,617,427
Global Wealth Management      
Disclosure Of Operating Segments [Line Items]      
Net interest income 3,714 3,413  
Non-interest income 10,504 9,309  
Total revenues 14,218 12,722  
Credit loss expense / (release) 7 9  
Operating expenses 10,536 10,150  
Operating profit / (loss) before tax 3,675 2,563  
Additional information      
Total assets 591,529   578,394
Personal & Corporate Banking      
Disclosure Of Operating Segments [Line Items]      
Net interest income 2,692 2,605  
Non-interest income 2,309 1,941  
Total revenues 5,001 4,547  
Credit loss expense / (release) 147 167  
Operating expenses 2,957 3,078  
Operating profit / (loss) before tax 1,897 1,302  
Additional information      
Total assets 472,891   479,956
Asset Management      
Disclosure Of Operating Segments [Line Items]      
Net interest income (28) (34)  
Non-interest income 1,556 1,547  
Total revenues 1,528 1,513  
Credit loss expense / (release) 0 0  
Operating expenses 1,097 1,224  
Operating profit / (loss) before tax 430 289  
Additional information      
Total assets 29,077   27,357
Investment Bank      
Disclosure Of Operating Segments [Line Items]      
Net interest income (1,046) (1,575)  
Non-interest income 8,826 7,724  
Total revenues 7,781 6,149  
Credit loss expense / (release) 110 83  
Operating expenses 5,315 4,788  
Operating profit / (loss) before tax 2,355 1,279  
Additional information      
Total assets 576,284   488,964
Non-core and Legacy      
Disclosure Of Operating Segments [Line Items]      
Net interest income (45) (23)  
Non-interest income 78 225  
Total revenues 33 202  
Credit loss expense / (release) (74) 6  
Operating expenses 465 838  
Operating profit / (loss) before tax (358) (642)  
Additional information      
Total assets 19,894   25,376
Group Items      
Disclosure Of Operating Segments [Line Items]      
Net interest income (570) (791)  
Non-interest income (47) 327  
Total revenues (617) (465)  
Credit loss expense / (release) 1 (1)  
Operating expenses (52) 2  
Operating profit / (loss) before tax (565) $ (465)  
Additional information      
Total assets $ 17,608   $ 17,380