v3.25.4
Goodwill and intangible assets - Goodwill and intangible assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Oct. 01, 2025
Oct. 01, 2024
Disclosure of detailed information about intangible assets [line items]        
Goodwill and intangible assets $ 13,107 $ 12,384    
Goodwill        
Disclosure of detailed information about intangible assets [line items]        
Goodwill and intangible assets 4,419 4,118 $ 1,800 $ 1,500
Other intangible assets        
Disclosure of detailed information about intangible assets [line items]        
Goodwill and intangible assets 8,688 8,266    
Internally generated software        
Disclosure of detailed information about intangible assets [line items]        
Intangible assets 7,500 7,100    
Capitalisation, intangible assets other than goodwill 3,000 2,500    
Impairment loss recognised in profit or loss, intangible assets other than goodwill   400    
Reversal of impairment loss recognised in profit or loss, intangible assets other than goodwill   67    
Amortisation, intangible assets other than goodwill $ 2,400 $ 2,000