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Basic and diluted net earnings per share
 12 Months Ended
Dec. 31, 2020
Earnings Per Share, Basic and Diluted [Abstract]  
Basic and diluted net earnings per share Basic and diluted net earnings per shareBasic 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, subscription receipts outstanding, 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 resulting from the application of the treasury stock method to outstanding share options and additional shares issued subsequent to year-end under the dividend reinvestment plan. The convertible debentures are convertible into common shares at any time prior to maturity or redemption by the Company. The shares issuable upon conversion of the convertible debentures are included in diluted earnings per share.
20.Basic and diluted net earnings per share (continued)
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:
20202019
Net earnings attributable to shareholders of AQN$782,463 $530,884 
Series A preferred shares dividend4,611 4,666 
Series D preferred shares dividend3,790 3,820 
Net earnings attributable to common shareholders of AQN – basic and diluted$774,062 $522,398 
Weighted average number of shares
Basic559,633,275 499,910,876 
Effect of dilutive securities4,740,561 4,828,678 
Diluted564,373,836 504,739,554 
The shares potentially issuable for the year ended December 31, 2020, as a result of 479,836 share options (2019 - 1,113,775) are excluded from this calculation as they are anti-dilutive.