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Bank Premises and Equipment (Tables)
6 Months Ended
Jun. 30, 2014
PropertyPlantAndEquipmentAbstract  
PropertyPlantAndEquipmentTextBlock
The following table provides a summary of bank premises and equipment as of: 
      
($ in millions) June 30, 2014December 31, 2013
Land and improvements$826  838 
Buildings 1,779  1,763 
Equipment 1,647  1,581 
Leasehold improvements 406  397 
Construction in progress 98  118 
Accumulated depreciation and amortization (2,265)  (2,166) 
Total $2,491 2,531