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Disclosure of Liability Classified Plans (Detail) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Jan. 01, 2023
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Beginning balance $ 88,523 $ 151,345  
Expensed during the year 42,828 32,063  
Settlement in shares (20,367) (19,963)  
Payments (53,053) (74,880)  
Foreign exchange (73) (42)  
Ending balance 57,858 88,523  
Current 44,192    
Long-term 13,666 16,755 $ 47,836
Restricted Share Units (RSUs) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Beginning balance 16,114 38,190  
Expensed during the year 10,511 6,594  
Settlement in shares (2,012) (2,101)  
Payments (13,037) (26,524)  
Foreign exchange (16) (45)  
Ending balance 11,560 16,114  
Current 8,567    
Long-term 2,993    
Performance Share Units (PSUs) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Beginning balance 64,042 100,858  
Expensed during the year 29,829 28,256  
Settlement in shares (18,355) (17,104)  
Payments (40,016) (47,971)  
Foreign exchange (57) 3  
Ending balance 35,443 64,042  
Current 24,770    
Long-term 10,673    
Deferred Share Units (DSUs) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Beginning balance 8,367 12,297  
Expensed during the year 2,488 (2,787)  
Settlement in shares   (758)  
Payments   (385)  
Foreign exchange    
Ending balance 10,855 $ 8,367  
Current 10,855    
Long-term $ 0