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Long-term investments | 12 Months Ended
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Dec. 31, 2024
Disclosure Long Term Investments And Notes Receivable [Abstract] |
Long-term investments | Long-term investments Long-term investments consist of the following:
| December 31, 2024 |  | December 31, 2023
Long-term investments carried at fair value |  |  |
Atlantica (a) | $ | — |  |  | $ | 1,052,703 |
Other | 2,058 |  |  | 1,962 |
| $ | 2,058 |  |  | $ | 1,054,665 |
Other long-term investments |  |  |
Equity-method investees (b) | $ | 38,113 |  |  | $ | 112,680 |
San Antonio Water System and other (c) | 27,586 |  |  | 27,417 |
| $ | 65,699 |  |  | $ | 140,097 |
Fair value change, income (loss) related to long-term investments from the years ended December 31 is as follows:
|  |  | Year ended December 31,
|  |  |  |  | 2024 |  | 2023
Fair value gain (loss) on investments carried at fair value |  |  |  |  |  |  |
Atlantica (a) |  |  |  |  | $ | 21,421 |  |  | $ | (215,437) |
Other |  |  |  |  | 263 |  |  | 133 |
|  |  |  |  | $ | 21,684 |  |  | $ | (215,304) |
Dividend and interest income from investments carried at fair value |  |  |  |  |  |  |
Atlantica |  |  |  |  | $ | 76,260 |  |  | $ | 87,154 |
Other |  |  |  |  | 50 |  |  | 49 |
|  |  |  |  | $ | 76,310 |  |  | $ | 87,203 |
Other long-term investments |  |  |  |  |  |  |
Equity method gain (loss) (b) |  |  |  |  | $ | 4,267 |  |  | $ | (1,919) |
Interest and other income |  |  |  |  | 5,178 |  |  | 6,776 |
|  |  |  |  | $ | 9,445 |  |  | $ | 4,857 |
Income (loss) from long-term investments |  |  |  |  | $ | 107,439 |  |  | $ | (123,244) |
(a)Investment in Atlantica Prior to December 12, 2024, Liberty (AY Holdings) B.V. ("AY Holdings"), an entity controlled and consolidated by AQN, held an approximately 42% share ownership (2023 - 42%) in Atlantica. On December 12, 2024, the Company completed the sale of its stake in Atlantica for $1,077,184. The Company had elected the fair value option under ASC 825, Financial Instruments, to account for its investment in Atlantica, with changes in fair value reflected in the consolidated statements of operations. 8.Long-term investments (continued) (b)Equity-method investees and development loans receivable from equity investees The Company has non-controlling interests, primarily a 9.8% ownership stake in a regulated transmission line in the province of Ontario and other non-regulated operating entities owned by its utilities. In total, the Company has non-controlling interests in various corporations, partnerships and joint ventures with a total carrying value of $38,113 (2023 - $112,680), including investment in VIEs of $nil (2023 - $73,737). (c)San Antonio Water System The Company does not have significant influence over San Antonio Water System investments. It is accounted for using the cost method and as at December 31, 2024, it is recorded at the cost of $25,634 (2023 - $25,634).

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