v2.4.0.6
Premises, Equipment, and Lease Commitments (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Operating Leases, Future Minimum Payments Due [Abstract]    
Operating Leases, 2012 $ 1,319  
Operating Leases, 2013 1,216  
Operating Leases, 2014 1,075  
Operating Leases, 2015 872  
Operating Leases, 2016 717  
Operating Leases, Thereafter 3,239  
Operating Leases, Total minimum lease payments 8,438  
Capital Leases, Future Minimum Payments Due [Abstract]    
Capital Leases, 2012 54  
Capital Leases, 2013 55  
Capital Leases, 2014 3  
Capital Leases, 2015 3  
Capital Leases, 2016 3  
Capital Leases, Thereafter 17  
Capital Leases, Total minimum lease payments 135  
Capital Leases, Executory Costs (9)  
Capital Leases, Amounts representing interest (10)  
Capital Leases, Present value of net minimum lease payments 116  
Property, Plant and Equipment [Line Items]    
Total premises and equipment 18,333 17,785
Less: Accumulated depreciation and amortization 8,802 8,141
Net book value, premises and equipment 9,531 9,644
Land [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 1,825 1,825
Buildings [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 7,441 7,440
Furniture and equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 7,195 6,689
Leasehold Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 1,725 1,683
Premises and equipment leased under capital leases [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment $ 147 $ 148