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Earnings Per Share
 6 Months Ended
Jun. 30, 2020
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 six months ended June 30, 2020 and 2019 (dollars and shares in millions, except per share amounts):
 
 
  
Quarter
 
  
Six Months
 
 
  
2020
 
  
2019
 
  
2020
 
  
2019
 
Net income attributable to HCA Healthcare, Inc.
  
$
1,079
 
  
$
783
 
  
$
1,660
 
  
$
1,822
 
Weighted average common shares outstanding
  
 
337.760
 
  
 
342.170
 
  
 
338.001
 
  
 
342.513
 
Effect of dilutive incremental shares
  
 
3.839
 
  
 
6.203
 
  
 
4.847
 
  
 
6.821
 
  
 
 
     
 
 
     
 
 
     
 
 
  
Shares used for diluted earnings per share
  
 
341.599
 
  
 
348.373
 
  
 
342.848
 
  
 
349.334
 
  
 
 
     
 
 
     
 
 
     
 
 
  
Earnings per share:
  
  
  
  
Basic earnings
  
$
3.20
 
  
$
2.29
 
  
$
4.91
 
  
$
5.32
 
Diluted earnings
  
$
3.16
 
  
$
2.25
 
  
$
4.84
 
  
$
5.22