v3.25.4
Segment and geographical information - Geographic distribution (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of operating segments [line items]    
Non-current assets $ 6,233 $ 6,924
Sales 5,462 6,174
UNITED STATES    
Disclosure of operating segments [line items]    
Non-current assets 2,317 2,748
Sales 3,568 4,150
CANADA    
Disclosure of operating segments [line items]    
Non-current assets 3,544 3,817
Sales 1,095 1,210
U.K and Europe [Member]    
Disclosure of operating segments [line items]    
Non-current assets 372 358
Sales 495 458
Asia [Member]    
Disclosure of operating segments [line items]    
Non-current assets 0 0
Sales 302 351
Other Geographical Areas [Member]    
Disclosure of operating segments [line items]    
Non-current assets 0 0
Sales $ 1 $ 5