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Long-term debt - Schedule of Long-term Debt (Details)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CAD ($)
Dec. 31, 2024
CLP ($)
Dec. 31, 2023
USD ($)
Jun. 30, 2021
Debt Instrument [Line Items]          
Long-term debt $ 6,698,773,000     $ 7,500,155,000  
Less: current portion (491,733,000)     (621,856,000)  
Long-term debt, excluding current portion $ 6,207,040,000     6,878,299,000  
Senior Unsecured Notes | Senior unsecured notes (Green Equity Units)          
Debt Instrument [Line Items]          
Weighted average coupon 5.37% 5.37% 5.37%   1.18%
Par value $ 1,140,787,000        
Long-term debt $ 1,140,167,000     1,144,897,000  
Senior Unsecured Notes | Senior unsecured notes          
Debt Instrument [Line Items]          
Weighted average coupon 4.25% 4.25% 4.25%    
Par value $ 2,195,000,000        
Long-term debt $ 2,181,759,000     1,406,278,000  
Senior Unsecured Notes | Senior unsecured utility notes          
Debt Instrument [Line Items]          
Weighted average coupon 6.30% 6.30% 6.30%    
Par value $ 137,000,000        
Long-term debt $ 145,558,000     147,589,000  
Senior Unsecured Notes | Senior unsecured utility bonds          
Debt Instrument [Line Items]          
Weighted average coupon 4.82% 4.82% 4.82%    
Par value $ 861,678,000        
Long-term debt $ 849,203,000     551,166,000  
Senior Unsecured Notes | Canadian dollar Senior unsecured notes          
Debt Instrument [Line Items]          
Weighted average coupon 3.32% 3.32% 3.32%    
Par value   $ 200,000,000      
Long-term debt $ 137,868,000     151,395,000  
Senior Unsecured Notes | Senior secured project notes          
Debt Instrument [Line Items]          
Weighted average coupon 10.21% 10.21% 10.21%    
Par value   $ 13,255,000      
Long-term debt $ 9,212,000     12,738,000  
Senior Unsecured Notes | Senior unsecured utility bonds          
Debt Instrument [Line Items]          
Weighted average coupon 3.73% 3.73% 3.73%    
Par value     $ 1,405,000    
Long-term debt $ 59,440,000     70,967,000  
Senior Unsecured Notes | Senior Unsecured Debt          
Debt Instrument [Line Items]          
Long-term debt $ 5,337,237,000     6,115,232,000  
Senior Unsecured Notes | 5.25%, U.S. Dollar Subordinated Unsecured Notes          
Debt Instrument [Line Items]          
Weighted average coupon 5.25% 5.25% 5.25%    
Par value   $ 400,000,000      
Long-term debt $ 274,281,000     298,382,000  
Senior Unsecured Notes | 5.56%, U.S. Dollar Subordinated Unsecured Notes          
Debt Instrument [Line Items]          
Weighted average coupon 5.97% 5.97% 5.97%    
Par value $ 1,100,000,000        
Long-term debt 1,087,255,000     1,086,541,000  
Revolving Credit Facility | Senior Unsecured Notes | Senior unsecured revolving credit facilities          
Debt Instrument [Line Items]          
Long-term debt 250,692,000     1,361,520,000  
Revolving Credit Facility | Senior Unsecured Notes | Senior unsecured bank credit facilities and delayed draw term facility          
Debt Instrument [Line Items]          
Long-term debt 180,346,000     786,962,000  
Revolving Credit Facility | Senior Unsecured Notes | Commercial paper          
Debt Instrument [Line Items]          
Long-term debt $ 382,992,000     $ 481,720,000