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Basic and diluted net earnings per share
 12 Months Ended
Dec. 31, 2021
Earnings Per Share, Basic and Diluted [Abstract]  
Basic and diluted net earnings per share Basic and diluted net earnings per share
Basic and diluted earnings per share have been calculated on the basis of net earnings attributable to the common shareholders of the Company and the weighted average number of common shares and bonus deferral restricted share units outstanding. Diluted net earnings per share is computed using the weighted-average number of common shares, additional shares issued subsequent to year-end under the dividend reinvestment plan, PSUs, RSUs and DSUs outstanding during the year and, if dilutive, potential incremental common shares related to the convertible debentures or resulting from the application of the treasury stock method to outstanding share options and Green Equity Units (note 9(c)).
The reconciliation of the net earnings and the weighted average shares used in the computation of basic and diluted earnings per share are as follows:
20212020
Net earnings attributable to shareholders of AQN$264,859 $782,463 
Preferred shares, Series A dividend4,942 4,611 
Preferred shares, Series D dividend4,061 3,790 
Net earnings attributable to common shareholders of AQN – basic and diluted$255,856 $774,062 
Weighted average number of shares
Basic622,347,677 559,633,275 
Effect of dilutive securities6,600,185 4,740,561 
Diluted628,947,862 564,373,836 
The common shares potentially issuable for the year ended December 31, 2021, as a result of 437,006 share options (2020 - 479,836) are excluded from this calculation as they are anti-dilutive.