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Other Assets - Narrative (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of joint operations [line items]    
Loan receivable   $ 55
Transmission infrastructure costs $ (16)  
Kent Hills Wind L.P.    
Disclosure of joint operations [line items]    
Loan receivable $ 37  
Ownership interests 17.00%  
Interest 4.55%  
Repayments received $ 18