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Bank Premises and Equipment (Tables)
 9 Months Ended
Sep. 30, 2014
Bank Premises and Equipment  
Bank Premises and Equipment
The following table provides a summary of bank premises and equipment as of: 
      
($ in millions) September 30, 2014December 31, 2013
Land and improvements$822  838 
Buildings 1,794  1,763 
Equipment 1,650  1,581 
Leasehold improvements 413  397 
Construction in progress 90  118 
Accumulated depreciation and amortization (2,302)  (2,166) 
Total $2,467 2,531