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Earnings Per Common Share Computation (Tables)
 12 Months Ended
Dec. 31, 2011
Earnings Per Common Share Computation [Abstract]  
Schedule Of Details Supporting The Computation Of Earnings Per Share
     2011      2010      2009  
     (dollars in millions, share amounts in thousands)  

Net income available for common stockholders

    $ 1,419       $ 1,099       $ 1,040   
  

 

 

     

 

 

     

 

 

  

Weighted-average outstanding shares of common stock used to compute basic earnings per common share

      165,413         167,782         167,364   

Dilutive effect of:

         

Employee stock options

      959         676         677   

Restricted stock awards

      1,455         1,340         1,030   
  

 

 

     

 

 

     

 

 

  

Shares used to compute diluted earnings per common share

      167,827         169,798         169,071   
  

 

 

     

 

 

     

 

 

  

Basic earnings per common share

    $ 8.58       $ 6.55       $ 6.21   
  

 

 

     

 

 

     

 

 

  

Diluted earnings per common share

    $ 8.46       $ 6.47       $ 6.15   
  

 

 

     

 

 

     

 

 

  

Number of antidilutive stock options and restricted stock awards excluded from computation

      864         3,820         5,675