v3.25.4
Basis of presentation (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Alberta Newsprint Company      
Basis of Presentation [Line Items]      
Proportion of ownership interest in joint operation   50.00%  
Cariboo Pulp & Paper Company      
Basis of Presentation [Line Items]      
Proportion of ownership interest in joint operation 50.00% 100.00% 50.00%