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 $ 4,079 $ 2,912  
Non-interest income 23,431 20,886  
Total revenues 27,510 23,798  
Credit loss expense / (release) 197 275  
Operating expenses 21,211 21,322  
Operating profit / (loss) before tax 6,101 2,201  
Tax expense / (benefit) 1,363 (32)  
Net profit / (loss) 4,738 2,233  
Additional information      
Total assets 1,707,065   $ 1,617,173
Global Wealth Management      
Disclosure Of Operating Segments [Line Items]      
Net interest income 3,508 3,176  
Non-interest income 10,500 9,287  
Total revenues 14,008 12,463  
Credit loss expense / (release) 13 6  
Operating expenses 10,606 10,190  
Operating profit / (loss) before tax 3,389 2,268  
Additional information      
Total assets 590,886   577,946
Personal & Corporate Banking      
Disclosure Of Operating Segments [Line Items]      
Net interest income 2,352 2,201  
Non-interest income 2,270 1,890  
Total revenues 4,622 4,091  
Credit loss expense / (release) 151 172  
Operating expenses 2,919 3,030  
Operating profit / (loss) before tax 1,552 890  
Additional information      
Total assets 474,285   481,784
Asset Management      
Disclosure Of Operating Segments [Line Items]      
Net interest income (28) (35)  
Non-interest income 1,556 1,547  
Total revenues 1,527 1,512  
Credit loss expense / (release) 0 0  
Operating expenses 1,100 1,225  
Operating profit / (loss) before tax 426 286  
Additional information      
Total assets 28,638   26,889
Investment Bank      
Disclosure Of Operating Segments [Line Items]      
Net interest income (1,040) (1,559)  
Non-interest income 8,733 7,428  
Total revenues 7,694 5,869  
Credit loss expense / (release) 108 90  
Operating expenses 5,379 4,840  
Operating profit / (loss) before tax 2,207 938  
Additional information      
Total assets 575,646   488,001
Non-core and Legacy      
Disclosure Of Operating Segments [Line Items]      
Net interest income (70) (134)  
Non-interest income 79 113  
Total revenues 9 (21)  
Credit loss expense / (release) (75) 9  
Operating expenses 708 1,488  
Operating profit / (loss) before tax (625) (1,519)  
Additional information      
Total assets 19,857   25,413
Group Items      
Disclosure Of Operating Segments [Line Items]      
Net interest income (643) (737)  
Non-interest income 293 621  
Total revenues (350) (116)  
Credit loss expense / (release) 1 (1)  
Operating expenses 499 548  
Operating profit / (loss) before tax (849) $ (663)  
Additional information      
Total assets $ 17,753   $ 17,140