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Asset Retirement Obligations - Additional Information (Details) - Asset retirement obligation - CAD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of other provisions [line items]      
Estimated cash flows, undiscounted amount $ 724,800 $ 721,700  
Estimated inflation rate 2.10% 1.80%  
Estimated risk free rate 3.30% 1.70%  
Other provisions $ 588,923 $ 743,683 $ 760,383
Other provisions, period of costs being incurred 60 years