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Computation of Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2014
Computation of EPS  
Schedule of Earnings Per Share, Basic and Diluted
   Three Months Ended September 30, Nine Months Ended September 30, 
   2014 2013 2014 2013 
               
   (Dollars in millions, except per share data, shares in thousands) 
 Net income available to common shareholders$ 520 $ 268 $ 1,446 $ 1,025 
               
 Weighted average number of common shares  720,117   704,134   717,373   702,219 
 Effect of dilutive outstanding equity-based awards  9,872   11,967   10,221   11,063 
 Weighted average number of diluted common shares  729,989   716,101   727,594   713,282 
               
 Basic EPS$ 0.72 $ 0.38 $ 2.02 $ 1.46 
               
 Diluted EPS$ 0.71 $ 0.37 $ 1.99 $ 1.44 
               
 Anti-dilutive awards  14,016   22,570   14,606   30,141