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Earnings Per Common Share Computation
 12 Months Ended
Dec. 31, 2011
Earnings Per Common Share Computation [Abstract]  
Earnings Per Common Share Computation

13. EARNINGS PER COMMON SHARE COMPUTATION

Detail supporting the computation of basic and diluted earnings per common share was as follows for the years ended December 31, 2011, 2010 and 2009:

 

     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