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Shareholders' capital (Tables)

12 Months Ended

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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