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Net Income Per Common Share Computations (Tables)
 3 Months Ended
Mar. 31, 2013
Computations of Net Income Per Common Share

The computations of net income per common share are presented in the following table.

 

($ In Millions Except Per Common Share Information)

    2013      2012  

Basic Net Income Per Common Share

      

Average Number of Common Shares Outstanding

      239,167,559         241,090,093   

Net Income Applicable to Common Stock

    $ 164.0       $ 161.2   

Less: Earnings Allocated to Participating Securities

      2.5         2.1   
  

 

 

     

 

 

  

Earnings Allocated to Common Shares Outstanding

    $ 161.5       $ 159.1   
  

 

 

     

 

 

  

Basic Net Income Per Common Share

      0.68         0.66   
  

 

 

     

 

 

  

Diluted Net Income Per Common Share

      

Average Number of Common Shares Outstanding

      239,167,559         241,090,093   

Plus: Dilutive Effect of Share-based Compensation

      1,021,656         466,003   
  

 

 

     

 

 

  

Average Common and Potential Common Shares

      240,189,215         241,556,096   
  

 

 

     

 

 

  

Earnings Allocated to Common and Potential Common Shares

    $ 161.5       $ 160.0   

Diluted Net Income Per Common Share

      0.67         0.66   
  

 

 

     

 

 

  

Note: Common stock equivalents totaling 4,603,526 and 15,013,663 for the three months ended March 31, 2013 and 2012, respectively, were not included in the computation of diluted net income per common share because their inclusion would have been antidilutive.