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Shareholders' capital (Tables) | 12 Months Ended
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Dec. 31, 2024
Equity [Abstract] |
Schedule of Number of Common Shares | Number of common shares
|  | 2024 |  | 2023
Common shares, beginning of year |  | 689,271,039 |  |  | 683,614,803 |
Settlement of Purchase contracts (a(ii)) |  | 76,909,700 |  |  | — |
Dividend reinvestment plan (a(i)) |  | — |  |  | 4,370,289 |
Exercise of share-based awards (b) |  | 1,162,653 |  |  | 1,284,532 |
Conversion of convertible debentures |  | 471 |  |  | 1,415 |
Common shares, end of year |  | 767,343,863 |  |  | 689,271,039 |
Schedule of Share-based Compensation Expense | For the year ended December 31, 2024, AQN recorded $18,388 (2023 - $10,508) in total share-based compensation expense as follows:
| 2024 |  | 2023
Share options | $ | 658 |  |  | $ | 1,325 |
Director deferred share units | 1,127 |  | 949
Employee share purchase | 639 |  | 897
Performance and restricted share units | 15,964 |  |  | 7,337 |
Total share-based compensation | $ | 18,388 |  |  | $ | 10,508 |
Schedule of Fair Value of Share Options Granted | The following assumptions were used to determine the fair value of share options granted in 2023:
| 2023
Risk-free interest rate | 3.4%
Expected volatility | 26.8%
Expected dividend paid | 8.6%
Expected life | 5.5 years
Weighted average grant date fair value per option | $1.04
Schedule of Stock Option Activity | Share option activity during the years is as follows:
| Number of awards |  | Weighted average exercise price |  | Weighted average remaining contractual term (years) |
Balance, January 1, 2023 | 2,626,780 |  |  | C$ | 16.02 |  |  | 5.63 |
Granted | 1,368,744 |  |  | 10.76 |  |  | 7.24 |
Exercised | — |  |  | — |  |  | — |  |
Forfeited | (1,327,799) |  |  | 16.55 |  |  | — |  |
Balance, December 31, 2023 | 2,667,725 |  |  | C$ | 14.71 |  |  | 5.18 |
Granted | — |  |  | — |  |  | — |  |
Exercised | — |  |  | — |  |  | — |  |
Forfeited | (622,646) |  |  | 15.12 |  |  | — |  |
Balance, December 31, 2024 | $ | 2,045,079 |  |  | C$ | 14.93 |  |  | 3.95 |
Exercisable, December 31, 2024 | $ | 1,873,957 |  |  | C$ | 15.34 |  |  | 3.73 |
Schedule of Performance Stock Units | A summary of the PSUs and RSUs is as follows:
| Number of awards |  | Weighted average grant-date fair value |  | Weighted average remaining contractual term (years) |  | Aggregate intrinsic value
Balance, January 1, 2023 | 2,109,710 |  |  | C$ | 18.38 |  |  | 1.76 |  | C$ | 18,608 |
Granted, including dividends | 2,841,967 |  |  | 10.98 |  | 2.02 |  | 25,329 |
Exercised | (922,883) |  |  | 18.73 |  | — |  | 10,125 |
Forfeited | (451,047) |  |  | 15.07 |  | — |  | 3,771 |
Balance, December 31, 2023 | 3,577,747 |  |  | C$ | 18.38 |  |  | 1.76 |  | C$ | 29,777 |
Granted, including dividends | 2,863,298 |  |  | 7.24 |  |  | 2.04 |  | 20,025 |
Exercised | (416,659) |  |  | 16.66 |  |  | — |  | 3,421 |
Forfeited | (833,416) |  |  | 11.91 |  |  | — |  | 5,317 |
Balance, December 31, 2024 | 5,190,970 |  |  | C$ | 18.38 |  |  | 1.43 |  | C$ | 33,118 |
Exercisable, December 31, 2024 | 889,318 |  |  | C$ | 18.51 |  |  | — |  |  | C$ | 5,674 |
Schedule of Shares Issued and Outstanding | The Company has the following Cumulative Rate Reset Preferred Shares, Series A (the "Series A Shares") and Cumulative Rate Reset Preferred Shares, Series D (the "Series D Shares") issued and outstanding as of December 31, 2024 and 2023:
| Number of shares |  | Price per share |  | Carrying amount C$ |  | Carrying amount $
Series A Shares | 4,800,000 |  |  | C$25.00 |  | C$ | 116,546 |  |  | $ | 100,463 |
Series D Shares | 4,000,000 |  |  | C$25.00 |  | C$ | 97,259 |  |  | $ | 83,836 |
|  |  |  |  |  |  | $ | 184,299 |

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