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Disclosure of Liability Classified Plans (Detail) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Beginning balance $ 60,755 $ 19,817
Expensed during the period $ 133,647 56,513
Settlement in shares (14,083)  
Reclassification from equity-settled plans $ (406) (3,164)
Payments (28,522) (12,411)
Foreign exchange (46)  
Ending balance 151,345 60,755
Current 91,212  
Long-term 60,133 26,728
Restricted Share Units (RSUs) [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Beginning balance 18,050 6,624
Expensed during the period 34,555 17,168
Payments (14,372) (5,742)
Foreign exchange (43)  
Ending balance 38,190 18,050
Current 26,330  
Long-term 11,860  
Performance Share Units (PSUs) [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Beginning balance 21,524 4,751
Expensed during the period $ 87,297 18,634
Settlement in shares 263,900  
Payments $ (7,960) (1,861)
Foreign exchange (3)  
Ending balance 100,858 21,524
Current 64,882  
Long-term 35,976  
Executive Performance Share Units [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Beginning balance 16,507 6,833
Expensed during the period $ 4,172 17,646
Settlement in shares (14,083)  
Reclassification from equity-settled plans $ (406) (3,164)
Payments (6,190) (4,808)
Ending balance 0 16,507
Current 0  
Deferred Share Units (DSUs) [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Beginning balance 4,674 1,609
Expensed during the period 7,623 3,065
Payments   0
Ending balance 12,297 $ 4,674
Long-term $ 12,297