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Shareholders' capital (Tables)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Schedule of Number of Common Shares

Number of common shares 

						2022						2021
Common shares, beginning of year						671,960,276						597,142,219
Public offering						2,861,709						67,611,465
Dividend reinvestment plan						7,676,666						6,184,686
Exercise of share-based awards (c)						1,115,398						1,020,020
Conversion of convertible debentures						754						1,886
Common shares, end of year						683,614,803						671,960,276

Schedule of Shares Issued and Outstanding

The Company has the following preferred shares, Series A and preferred shares, Series D issued and outstanding as at December 31, 2022 and 2021:

Preferred shares			Number of shares						Price per share						Carrying amount C$						Carrying amount $
Series A			4,800,000						C$	25					C$	116,546					$	100,463
Series D			4,000,000						C$	25					C$	97,259					$	83,836
																					$	184,299

Schedule of Share-based Compensation Expense

For the year ended December 31, 2022, AQN recorded $10,920 (2021 - $8,395) in total share-based compensation expense as follows: 

			2022						2021
Share options			$	980					$	939
Director deferred share units			960						821
Employee share purchase			562						592
Performance and restricted share units			8,418						6,043
Total share-based compensation			$	10,920					$	8,395

Schedule of Fair Value of Share Options Granted

The following assumptions were used in determining the fair value of share options granted: 

			2022						2021
Risk-free interest rate			1.9		%				1.1		%
Expected volatility			23		%				23		%
Expected dividend yield			4.3		%				4.1		%
Expected life			5.50 years						5.50 years
Weighted average grant date fair value per option			C$	2.44					C$	2.46

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)						Aggregate intrinsic value
Balance, January 1, 2021			2,110,448						C$	15.45					6.55						C$	11,604
Granted			437,006						19.64						7.22						—
Exercised			(506,926)						13.92						5.95						1,453
Forfeited			—						—						—						—
Balance, December 31, 2021			2,040,528						C$	15.45					6.11						C$	3,145
Granted			646,090						19.11						7.22						—
Exercised			(40,074)						13.92						5.95						103
Forfeited			(19,764)						19.11						—						—
Balance, December 31, 2022			2,626,780						C$	16.02					5.63						C$	—
Exercisable, December 31, 2022			2,052,946						C$	17.35					5.63						C$	—

Schedule of Performance Stock Units

A summary of the PSUs and RSUs follows: 

			Number of awards						Weighted average grant-date fair value						Weighted average remaining contractual term (years)						Aggregate intrinsic value
Balance, January 1, 2021			2,721,207						C$	16.58					0.93						C$	54,560
Granted, including dividends			805,433						19.94						2.77						12,881
Exercised			(865,067)						13.79						—						17,005
Forfeited			(217,901)						18.64						—						3,981
Balance, December 31, 2021			2,443,672						C$	18.07					1.72						C$	44,646
Granted, including dividends			1,090,457						17.99						2.00						17,524
Exercised			(1,221,620)						12.62						—						23,636
Forfeited			(202,799)						18.94						—						418
Balance, December 31, 2022			2,109,710						C$	18.38					1.76						C$	18,608
Exercisable, December 31, 2022			769,458						C$	18.70					0.10						C$	6,787

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