Basis of presentation (Details)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
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	100.00%	50.00%

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Total for all joint operations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration