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Earnings Per Share
12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share

(15)  Earnings Per Share

Basic earnings per share is computed by dividing net income by the weighted average shares outstanding during the year. The computation of diluted earnings per share reflects the potential dilutive effect, using the treasury stock method, of outstanding awards under stock-based employee compensation plans.

The following table sets forth the computation of basic and diluted earnings per share:

 

     Years Ended December 31  
     2014        2013        2012  
     (in millions except for per
share amounts)
 

Basic earnings per share:

            

Net income

   $ 2,100         $ 2,345         $ 1,545   
  

 

 

      

 

 

      

 

 

 

Weighted average shares outstanding

     242.9           258.2           269.5   
  

 

 

      

 

 

      

 

 

 

Basic earnings per share

   $ 8.65         $ 9.08         $ 5.73   
  

 

 

      

 

 

      

 

 

 

Diluted earnings per share:

            

Net income

   $ 2,100         $ 2,345         $ 1,545   
  

 

 

      

 

 

      

 

 

 

Weighted average shares outstanding

     242.9           258.2           269.5   

Additional shares from assumed issuance of shares under stock-based compensation awards

     .6           1.2           1.9   
  

 

 

      

 

 

      

 

 

 

Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share

     243.5           259.4           271.4   
  

 

 

      

 

 

      

 

 

 

Diluted earnings per share

   $ 8.62         $ 9.04         $ 5.69