Nature of operations	12 Months Ended
Dec. 31, 2025
Corporate information and statement of IFRS compliance [abstract]
Nature of operations	Nature of operations West Fraser Timber Co. Ltd. ("West Fraser", the “Company”, "we", "us" or "our") is a diversified wood products company with more than 50 facilities in Canada, the U.S., the U.K., and Europe, which promotes sustainable forest practices in its operations. The Company produces lumber, engineered wood products (OSB, LVL, MDF, plywood, and particleboard), northern bleached softwood kraft pulp, paper, wood chips, and other residuals. West Fraser's products are used in home construction, repair and remodelling, industrial applications, papers and tissue. Our executive office is located at 885 West Georgia Street, Suite 1500, Vancouver, British Columbia. West Fraser was formed by articles of amalgamation under the Business Corporations Act (British Columbia) and is registered in British Columbia, Canada. Our Common shares are listed for trading on the Toronto Stock Exchange (“TSX”) and on the New York Stock Exchange (“NYSE”) under the symbol WFG.

Nature of operations

12 Months Ended

Dec. 31, 2025

Corporate information and statement of IFRS compliance [abstract]

West Fraser Timber Co. Ltd. ("West Fraser", the “Company”, "we", "us" or "our") is a diversified wood products company with more than 50 facilities in Canada, the U.S., the U.K., and Europe, which promotes sustainable forest practices in its operations. The Company produces lumber, engineered wood products (OSB, LVL, MDF, plywood, and particleboard), northern bleached softwood kraft pulp, paper, wood chips, and other residuals. West Fraser's products are used in home construction, repair and remodelling, industrial applications, papers and tissue. Our executive office is located at 885 West Georgia Street, Suite 1500, Vancouver, British Columbia. West Fraser was formed by articles of amalgamation under the Business Corporations Act (British Columbia) and is registered in British Columbia, Canada. Our Common shares are listed for trading on the Toronto Stock Exchange (“TSX”) and on the New York Stock Exchange (“NYSE”) under the symbol WFG.