v2.4.0.6
Premises, Equipment and Lease Commitments (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Operating Leases, Future Minimum Payments Due [Abstract]    
Operating Leases, 2013 $ 1,311  
Operating Leases, 2014 1,184  
Operating Leases, 2015 970  
Operating Leases, 2016 808  
Operating Leases, 2017 657  
Operating Leases, Thereafter 2,594  
Operating Leases, Total minimum lease payments 7,524  
Capital Leases, Future Minimum Payments Due [Abstract]    
Capital Leases, 2013 3  
Capital Leases, 2014 3  
Capital Leases, 2015 3  
Capital Leases, 2016 3  
Capital Leases, 2017 2  
Capital Leases, Thereafter 15  
Capital Leases, Total minimum lease payments 29  
Capital Leases, Executory Costs (8)  
Capital Leases, Amounts representing interest (9)  
Capital Leases, Present value of net minimum lease payments 12  
Property, Plant and Equipment [Line Items]    
Total premises and equipment 18,657 18,333
Less: Accumulated depreciation and amortization 9,229 8,802
Net book value, premises and equipment 9,428 9,531
Land [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 1,832 1,825
Buildings [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 7,670 7,441
Furniture and equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 7,194 7,195
Leasehold improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment 1,839 1,725
Premises and equipment leased under capital leases [Member]
    
Property, Plant and Equipment [Line Items]    
Total premises and equipment $ 122 $ 147