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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Computations of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share for the quarters and six months ended June 30, 2019 and 2018 (dollars and shares in millions, except per share amounts):
                                 
 
Quarter
   
Six Months
 
 
2019
   
2018
   
2019
   
2018
 
Net income attributable to HCA Healthcare, Inc.
 
$
783
    $
820
   
$
1,822
    $
1,964
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average common shares outstanding
   
342.170
     
348.615
     
342.513
     
349.726
 
Effect of dilutive incremental shares
   
6.203
     
6.424
     
6.821
     
7.662
 
                                 
Shares used for diluted earnings per share
   
348.373
     
355.039
     
349.334
     
357.388
 
                                 
Earnings per share:
   
     
     
     
 
Basic earnings
 
$
2.29
    $
2.35
   
$
5.32
    $
5.62
 
Diluted earnings
 
$
2.25
    $
2.31
   
$
5.22
    $
5.50