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Earnings Per Share
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
AbbVie grants certain restricted stock units (RSUs) that are considered to be participating securities. Due to the presence of participating securities, AbbVie calculates earnings per share (EPS) using the more dilutive of the treasury stock or the two-class method. For all periods presented, the two-class method was more dilutive.
The following table summarizes the impact of the two-class method:
Years ended December 31,
(in millions, except per share data)202120202019
Basic EPS
Net earnings attributable to AbbVie Inc.$11,542 $4,616 $7,882 
Earnings allocated to participating securities74 60 40 
Earnings available to common shareholders$11,468 $4,556 $7,842 
Weighted average basic shares of common stock outstanding1,770 1,667 1,481 
Basic earnings per share attributable to AbbVie Inc.$6.48 $2.73 $5.30 
Diluted EPS
Net earnings attributable to AbbVie Inc.$11,542 $4,616 $7,882 
Earnings allocated to participating securities74 60 40 
Earnings available to common shareholders$11,468 $4,556 $7,842 
Weighted average shares of common stock outstanding1,770 1,667 1,481 
Effect of dilutive securities7 6 3 
Weighted average diluted shares of common stock outstanding1,777 1,673 1,484 
Diluted earnings per share attributable to AbbVie Inc.$6.45 $2.72 $5.28 
Certain shares issuable under stock-based compensation plans were excluded from the computation of EPS because the effect would have been antidilutive. The number of common shares excluded was insignificant for all periods presented.