v3.25.4
Goodwill and other intangibles - Schedule of Goodwill (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about intangible assets [line items]    
Goodwill $ 1,471 $ 1,879
Canadian lumber    
Disclosure of detailed information about intangible assets [line items]    
Goodwill 171 171
U.S. lumber    
Disclosure of detailed information about intangible assets [line items]    
Goodwill 0 409
North America EWP    
Disclosure of detailed information about intangible assets [line items]    
Goodwill 1,280 1,280
Europe EWP    
Disclosure of detailed information about intangible assets [line items]    
Goodwill $ 20 $ 19