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Shares Used in Computing Net Income Per Share (Tables)
 6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Weighted-Average Number of Shares

The computation of shares used in calculating basic and diluted net income per common share is as follows:

 

     Three Months
Ended
June 30,		      Six Months
Ended
June 30,		  

(In millions)

    2015      2014      2015      2014  

Weighted-average common shares outstanding used for the calculation of net income per share – basic

      236.5         249.3         237.6         251.9   

Common stock equivalents

      3.9         4.1         4.1         4.1   
  

 

 

     

 

 

     

 

 

     

 

 

  

Weighted-average common shares outstanding used for the calculation of net income per share – diluted

      240.4         253.4         241.7         256.0