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Long-term debt - Schedule of Long-term Debt (Details)
Jun. 30, 2024
USD ($)
Jun. 30, 2024
CAD ($)
Jun. 30, 2024
CLP ($)
Dec. 31, 2023
USD ($)
Jun. 30, 2021
Debt Instrument [Line Items]          
Long-term debt $ 8,292,649,000     $ 8,516,030,000  
Less: current portion (158,278,000)     (621,856,000)  
Long-term debt, excluding current portion 8,134,371,000     7,894,174,000  
Senior Unsecured Notes          
Debt Instrument [Line Items]          
Long-term debt $ 1,375,539,000     1,384,923,000  
Senior Unsecured Notes | Senior unsecured notes (Green Equity Units)          
Debt Instrument [Line Items]          
Weighted average coupon 5.37% 5.37% 5.37%   1.18%
Face value $ 1,140,787,000        
Long-term debt $ 1,135,137,000     1,144,897,000  
Senior Unsecured Notes | Senior unsecured notes          
Debt Instrument [Line Items]          
Weighted average coupon 4.25% 4.25% 4.25%    
Face value $ 2,195,000,000        
Long-term debt $ 2,181,669,000     1,406,278,000  
Senior Unsecured Notes | Senior unsecured utility notes          
Debt Instrument [Line Items]          
Weighted average coupon 6.30% 6.30% 6.30%    
Face value $ 137,000,000        
Long-term debt $ 146,623,000     147,589,000  
Senior Unsecured Notes | Senior unsecured notes          
Debt Instrument [Line Items]          
Weighted average coupon 3.68% 3.68% 3.68%    
Face value   $ 1,200,000,000      
Long-term debt $ 873,025,000     904,604,000  
Senior Unsecured Notes | Senior secured project notes          
Debt Instrument [Line Items]          
Weighted average coupon 10.21% 10.21% 10.21%    
Face value   $ 15,097,000      
Long-term debt $ 11,030,000     12,738,000  
Senior Unsecured Notes | Senior unsecured utility bonds          
Debt Instrument [Line Items]          
Weighted average coupon 3.82% 3.82% 3.82%    
Face value     $ 1,463,000    
Long-term debt $ 64,026,000     70,967,000  
Senior Unsecured Notes | Senior Unsecured Debt          
Debt Instrument [Line Items]          
Long-term debt $ 6,917,110,000     7,131,107,000  
Senior Unsecured Notes | 5.25%, U.S. Dollar Subordinated Unsecured Notes          
Debt Instrument [Line Items]          
Weighted average coupon 5.25% 5.25% 5.25%    
Face value   $ 400,000,000      
Long-term debt $ 288,459,000     298,382,000  
Senior Unsecured Notes | 5.21% U.S. Dollar Subordinated Unsecured Notes          
Debt Instrument [Line Items]          
Weighted average coupon 5.21% 5.21% 5.21%    
Face value $ 1,100,000,000        
Long-term debt $ 1,087,080,000     1,086,541,000  
Senior secured project notes | Senior secured utility bonds          
Debt Instrument [Line Items]          
Weighted average coupon 4.82% 4.82% 4.82%    
Face value $ 861,681,000        
Long-term debt $ 850,773,000     551,166,000  
Senior secured project notes | Construction loan          
Debt Instrument [Line Items]          
Weighted average coupon 6.57% 6.57% 6.57%    
Face value $ 163,735,000        
Long-term debt 163,735,000     0  
Revolving Credit Facility | Senior Unsecured Notes | Senior unsecured revolving credit facilities          
Debt Instrument [Line Items]          
Long-term debt 668,876,000     1,624,186,000  
Revolving Credit Facility | Senior Unsecured Notes | Senior unsecured bank credit facilities and delayed draw term facility          
Debt Instrument [Line Items]          
Long-term debt 789,216,000     786,962,000  
Revolving Credit Facility | Senior Unsecured Notes | Commercial Paper [Member]          
Debt Instrument [Line Items]          
Long-term debt $ 33,000,000     $ 481,720,000