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Short-Term Borrowings
12 Months Ended
Dec. 31, 2014
Short Term Borrowings Summary  
Short-Term Borrowings

NOTE 8. Short-Term Borrowings

       December 31, 
       2014 2013 
             
       (Dollars in millions) 
 Federal funds purchased$ 1,402 $ 1,443 
 Securities sold under agreements to repurchase  317   463 
 Other short-term borrowed funds  1,998   2,232 
  Total short-term borrowings$ 3,717 $ 4,138 

A summary of selected data related to short-term borrowings follows:

       As Of / For The Year Ended December 31, 
       2014 2013 2012 
                   
       (Dollars in millions) 
 Maximum outstanding at any month-end during the year$ 5,056  $ 5,196  $ 4,385  
 Balance outstanding at end of year  3,717    4,138    2,864  
 Average outstanding during the year  3,421    4,459    3,408  
 Average interest rate during the year (includes derivative impact)  0.11%   0.13% 0.20% 
 Average interest rate at end of year  0.09    0.12    0.22