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Income Tax - Summary Of Deductible Temporary Differences Of Income Tax Expenses (Detail) - CAD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised $ 2,172,298 $ 225,903
Canadian Tax Losses [Member]    
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 215,703 138,408
Canadian Long-term assets [Member]    
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 23,896 22,758
Canadian Accounting provisions and other accruals [Member]    
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 29,143 26,363
Foreign tax Losses [Member]    
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 2,089,604 38,374
Foreign Long-term assets [Member]    
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised (59,931) 0
Foreign Accounting provisions and other accruals [Member]    
Disclosure of Deductible Temporary Differences of Income Tax Expenses [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised $ (126,117) $ 0