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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 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 ended March 31, 2019 and 2018 (dollars and shares in millions, except per share amounts):
                 
 
2019
   
2018
 
Net income attributable to HCA Healthcare, Inc.
 
$
1,039
    $
1,144
 
                 
Weighted average common shares outstanding
   
342.876
     
350.850
 
Effect of dilutive incremental shares
   
7.440
     
8.899
 
                 
Shares used for diluted earnings per share
   
350.316
     
359.749
 
                 
Earnings per share:
   
     
 
Basic earnings
 
$
3.03
    $
3.26
 
Diluted earnings
 
$
2.97
    $
3.18