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Premises and Equipment (Tables)
12 Months Ended
Dec. 31, 2011
Premises and Equipment [Abstract]  
Premises and equipment
                 
(Dollars in Millions)   2011     2010  

Land

  $ 525     $ 516  

Buildings and improvements

    3,144       3,073  

Furniture, fixtures and equipment

    2,449       2,791  

Capitalized building and equipment leases

    95       88  

Construction in progress

    44       50  
      6,257       6,518  

Less accumulated depreciation and amortization

    (3,600     (4,031

Total

  $ 2,657     $ 2,487