v3.25.4
Restructuring and impairment charges - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Restructuring and impairment charges [Line Items]    
Restructuring and impairment charges $ 712 $ 102
Impairment 241 15
Other Restructuring Charges 0 3
Impairment Loss, Estimated Recoverable Amount 7  
Impairment loss recognised in profit or loss, goodwill   70
Hinton pulp mill    
Restructuring and impairment charges [Line Items]    
Impairment   3
U.S. lumber    
Restructuring and impairment charges [Line Items]    
Impairment 409 0
Impairment loss recognised in profit or loss, goodwill 409  
Canadian lumber    
Restructuring and impairment charges [Line Items]    
Impairment 64 $ 28
100 Mill House, British Columbia Lumber Mill    
Restructuring and impairment charges [Line Items]    
Impairment 21  
Augusta, Georgia Lumber Mill    
Restructuring and impairment charges [Line Items]    
Impairment 43  
OSB Mill, Augusta Mill, And 100 Mile House Lumber Mill    
Restructuring and impairment charges [Line Items]    
Impairment $ 303