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Earnings Per Share
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Earnings Per Share
NOTE 4 — EARNINGS PER SHARE
We compute basic earnings per share using the weighted average number of common shares outstanding. We compute diluted earnings per share using the weighted average number of common shares outstanding, plus the dilutive effect of outstanding equity awards and potential shares, computed using the treasury stock method.
The following table sets forth the computation of basic and diluted earnings per share for the quarters and nine months ended September 30, 2019 and 2018 (dollars and shares in millions, except per share amounts):
 
Quarter
   
Nine Months
 
  
2019
 
  
2018
 
  
2019
 
  
2018
 
Net income attributable to HCA Healthcare, Inc.
 
$
612
 
   $
759
   
$
2,434
 
   $
2,723
 
                                 
Weighted average common shares outstanding
 
 
340.789
 
    
345.823
   
 
341.932
 
    
348.411
 
Effect of dilutive incremental shares
 
 
6.698
 
    
7.816
   
 
6.780
 
    
7.713
 
                                 
Shares used for diluted earnings per share
 
 
347.487
 
    
353.639
   
 
348.712
 
    
356.124
 
                                 
Earnings per share:
 
 
 
    
   
 
 
    
 
Basic earnings
 
$
1.80
 
   $
2.20
   
$
7.12
 
   $
7.82
 
Diluted earnings
 
$
1.76
 
   $
2.15
   
$
6.98
 
   $
7.65