Restructuring and impairment charges - Schedule of Restructuring and Impairment Charges (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Restructuring and impairment charges [Line Items] | ||
| Impairment loss recognised in profit or loss, goodwill | $ 70 | |
| Impairment | $ 241 | 15 |
| Other Restructuring Charges | 0 | 3 |
| Restructuring and impairment charges | 712 | 102 |
| U.S. lumber | ||
| Restructuring and impairment charges [Line Items] | ||
| Impairment loss recognised in profit or loss, goodwill | 409 | |
| Impairment | 409 | 0 |
| Europe EWP CGU | ||
| Restructuring and impairment charges [Line Items] | ||
| Impairment | 0 | 70 |
| Canadian lumber | ||
| Restructuring and impairment charges [Line Items] | ||
| Impairment | 64 | 28 |
| Other restructuring charges | ||
| Restructuring and impairment charges [Line Items] | ||
| Impairment | 0 | 2 |
| High Level OSB Mill | ||
| Restructuring and impairment charges [Line Items] | ||
| Impairment loss recognised in profit or loss, goodwill | $ 239 | $ 0 |