XML 16 R39.htm IDEA: XBRL DOCUMENT v2.4.0.6
Computation of Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2012
Computation of Earnings Per Share  
Schedule of Earnings Per Share, Basic and Diluted
      Three Months Ended March 31, 
      2012 2011 
            
     (Dollars in millions, except per 
      share data, shares in thousands) 
 Basic Earnings Per Share:       
  Net income available to common shareholders $ 431 $ 225 
  Weighted average number of common shares   697,685   695,309 
  Basic earnings per share  $ 0.62 $ 0.32 
            
 Diluted Earnings Per Share:       
  Net income available to common shareholders $ 431 $ 225 
  Weighted average number of common shares   697,685   695,309 
  Add:       
   Effect of dilutive outstanding equity-based awards   9,684   8,792 
  Weighted average number of diluted common shares   707,369   704,101 
  Diluted earnings per share  $ 0.61 $ 0.32