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Asset Impairment Charges (Reversals) - Disclosure of Fair Value Less Cost of Disposal (Details)
Dec. 31, 2023
Dec. 31, 2022
Canada | Wind and Solar | Contract Discount Rate    
Disclosure of detailed information about property, plant and equipment [line items]    
Current year contract and merchant discount rates 6.40%  
Prior period contract and merchant discount rates   6.40%
Canada | Wind and Solar | Merchant Discount Rate    
Disclosure of detailed information about property, plant and equipment [line items]    
Current year contract and merchant discount rates 7.00%  
Prior period contract and merchant discount rates   7.10%
Canada | Hydro | Contract Discount Rate    
Disclosure of detailed information about property, plant and equipment [line items]    
Current year contract and merchant discount rates 6.10%  
Prior period contract and merchant discount rates   5.90%
Canada | Hydro | Merchant Discount Rate    
Disclosure of detailed information about property, plant and equipment [line items]    
Current year contract and merchant discount rates 6.40%  
Prior period contract and merchant discount rates   6.40%
US | Wind and Solar | Contract Discount Rate    
Disclosure of detailed information about property, plant and equipment [line items]    
Current year contract and merchant discount rates 6.90%  
Prior period contract and merchant discount rates   6.50%
US | Wind and Solar | Merchant Discount Rate    
Disclosure of detailed information about property, plant and equipment [line items]    
Current year contract and merchant discount rates 7.50%  
Prior period contract and merchant discount rates   7.70%