v3.25.4
Segment and geographical information - Segment information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of operating segments [line items]    
Sales $ 5,462 $ 6,174
Cost of products sold (4,184) (4,333)
Freight and other distribution costs (766) (815)
Export duties, net, and tariffs (177) (72)
Amortization (544) (549)
Selling, general and administration (280) (282)
Equity-based compensation 14 (14)
Profit (loss) from operating activities (1,187) 7
Total assets 7,620 8,760
Total liabilities 1,771 1,807
Lumber    
Disclosure of operating segments [line items]    
Sales 2,561 2,592
NA EWP    
Disclosure of operating segments [line items]    
Sales 2,140 2,803
Pulp & Paper    
Disclosure of operating segments [line items]    
Sales 325 389
Europe EWP    
Disclosure of operating segments [line items]    
Sales 493 453
Corporate & Other    
Disclosure of operating segments [line items]    
Sales (58) (63)
Operating segments    
Disclosure of operating segments [line items]    
Sales 5,462 6,175
Cost of products sold (4,184) (4,333)
Freight and other distribution costs (766) (815)
Export duties, net, and tariffs (177) (72)
Amortization (544) (549)
Selling, general and administration (280) (282)
Equity-based compensation 14 (14)
Restructuring and impairment charges (712) (102)
Profit (loss) from operating activities (1,187) 7
Total assets 7,620 8,760
Total liabilities 1,771 1,807
Capital expenditures 411 487
Operating segments | Lumber    
Disclosure of operating segments [line items]    
Sales 2,523 2,550
Cost of products sold (1,977) (2,080)
Freight and other distribution costs (371) (382)
Export duties, net, and tariffs (175) (72)
Amortization (193) (192)
Selling, general and administration (137) (142)
Equity-based compensation 0 0
Restructuring and impairment charges (473) (28)
Profit (loss) from operating activities (766) (303)
Total assets 3,234 3,641
Total liabilities 668 635
Capital expenditures 210 312
Operating segments | NA EWP    
Disclosure of operating segments [line items]    
Sales 2,131 2,794
Cost of products sold (1,581) (1,634)
Freight and other distribution costs (304) (326)
Export duties, net, and tariffs (1) 0
Amortization (290) (284)
Selling, general and administration (101) (99)
Equity-based compensation 0 0
Restructuring and impairment charges (239) (1)
Profit (loss) from operating activities (376) 459
Total assets 3,431 3,943
Total liabilities 450 572
Capital expenditures 163 140
Operating segments | Pulp & Paper    
Disclosure of operating segments [line items]    
Sales 315 378
Cost of products sold (270) (309)
Freight and other distribution costs (45) (65)
Export duties, net, and tariffs 0 0
Amortization (15) (14)
Selling, general and administration (11) (11)
Equity-based compensation 0 0
Restructuring and impairment charges 0 (3)
Profit (loss) from operating activities (16) (13)
Total assets 184 187
Total liabilities 85 89
Capital expenditures 14 15
Operating segments | Europe EWP    
Disclosure of operating segments [line items]    
Sales 493 453
Cost of products sold (414) (375)
Freight and other distribution costs (44) (42)
Export duties, net, and tariffs 0 0
Amortization (42) (48)
Selling, general and administration (30) (29)
Equity-based compensation 0 0
Restructuring and impairment charges 0 (70)
Profit (loss) from operating activities (37) (110)
Total assets 532 561
Total liabilities 151 136
Capital expenditures 20 19
Operating segments | Corporate & Other    
Disclosure of operating segments [line items]    
Sales 0 0
Cost of products sold 58 64
Freight and other distribution costs 0 0
Export duties, net, and tariffs 0 0
Amortization (5) (11)
Selling, general and administration (1) (1)
Equity-based compensation 14 (14)
Restructuring and impairment charges 0 (1)
Profit (loss) from operating activities 9 (26)
Total assets 238 429
Total liabilities 416 375
Capital expenditures 4 1
Elimination of intersegment amounts    
Disclosure of operating segments [line items]    
Sales 0 0
Elimination of intersegment amounts | Lumber    
Disclosure of operating segments [line items]    
Sales 39 42
Elimination of intersegment amounts | NA EWP    
Disclosure of operating segments [line items]    
Sales 9 9
Elimination of intersegment amounts | Pulp & Paper    
Disclosure of operating segments [line items]    
Sales 10 11
Elimination of intersegment amounts | Europe EWP    
Disclosure of operating segments [line items]    
Sales 0 0
Elimination of intersegment amounts | Corporate & Other    
Disclosure of operating segments [line items]    
Sales $ (58) $ (62)