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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 |

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