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Intangible assets - Allocation of goodwill (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about intangible assets    
Goodwill $ 966 $ 999
Europe    
Disclosure of detailed information about intangible assets    
Goodwill 527 560
Americas    
Disclosure of detailed information about intangible assets    
Goodwill $ 439 $ 439