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Income Tax - Additional Information (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
CAD ($)
Dec. 31, 2021
CAD ($)
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 $ 2,172,298 $ 225,903  
Unused tax credits for which no deferred tax asset recognised $ 1,100 $ 1,100  
Average effective tax rate 8.40% 8.80%  
US      
Disclosure of defined benefit plans [line items]      
Unused tax credits for which no deferred tax asset recognised     $ 122.4