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Income Tax - Additional Information (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2023
CAD ($)
Dec. 31, 2022
CAD ($)
Dec. 31, 2022
USD ($)
Disclosure of defined benefit plans [line items]      
Federal Income Tax Rate 15.00% 15.00%  
Deductible temporary differences for which no deferred tax asset is recognised $ 1,209,815 $ 1,179,064 [1]  
Unused tax credits for which no deferred tax asset recognised $ 1,000 $ 1,000  
Average effective tax rate 8.50% 8.40%  
US      
Disclosure of defined benefit plans [line items]      
Unused tax credits for which no deferred tax asset recognised $ 78,000   $ 75
[1] Certain balances as at December 31, 2022 have been restated as a result of measurement period adjustments related to the Transaction as required by IFRS 3 “Business Combinations”, refer to Note 6 “Acquisition” for more information.