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Long-term investments - Investments in Significant Partnerships and Joint Ventures (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Equity Method Investment, Summarized Financial Information [Abstract] |  |  |
Total assets | $ 18,373,961 | $ 17,627,613 |
AQN's investment carrying amount for the entities | 456,393 | 381,802 |
Income Statement [Abstract] |  |  |
Revenue | 2,698,015 | 2,765,013 |
Net loss | (33,305) | (308,155) |
OCI | 58,794 | (90,036) |
Investments in Significant Partnerships and Joint Ventures |  |  |
Equity Method Investment, Summarized Financial Information [Abstract] |  |  |
Total assets | 3,235,474 | 2,740,132 |
Total liabilities | 1,962,115 | 1,507,079 |
Net assets | 1,273,359 | 1,233,053 |
Income Statement [Abstract] |  |  |
Revenue | 111,446 | 65,025 |
Net loss | (3,633) | (31,070) |
OCI | 12,026 | (130,729) |
Investments in Significant Partnerships and Joint Ventures | APUC |  |  |
Income Statement [Abstract] |  |  |
Net loss | (5,936) | (21,416) |
OCI | 7,693 | (67,110) |
Investments in Significant Partnerships and Joint Ventures |  |  |
Equity Method Investment, Summarized Financial Information [Abstract] |  |  |
AQN's investment carrying amount for the entities | 456,393 | 381,802 | $ 433,850
Investments in Significant Partnerships and Joint Ventures | APUC |  |  |
Equity Method Investment, Summarized Financial Information [Abstract] |  |  |
AQN's ownership interest in the entities | 388,993 | 332,663 |
Difference between investment carrying amount and underlying equity in net assets | 67,400 | 49,139 |
AQN's investment carrying amount for the entities | $ 456,393 | $ 381,802 |

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