RELATED PARTY TRANSACTIONS - Management arrangements (Details) - CAD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
RELATED PARTY TRANSACTIONS
Management fees	$ 35.4	$ 30.5	$ 34.9

The amount of services received in related party transactions. [Refer: Total for all related parties [member]]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Note Effective 2027-01-01
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Note Effective 2027-01-01
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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration