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Premises, Equipment, Lease Commitments and Other Assets (Tables)
 12 Months Ended
Dec. 31, 2011
Other Assets (Tables) [Abstract]  
Summary of Premises and Equipment
        
        
      December 31,
(in millions)  2011 2010
Land$ 1,825 1,825
Buildings  7,441 7,440
Furniture and equipment  7,195 6,689
Leasehold improvements  1,725 1,683
Premises and equipment leased   
 under capital leases  147 148
  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
Future Minimum Payments Under Capital Leases and Noncancelable Operating Leases
       
       
    Operating Capital
(in millions) leases leases
Year ended December 31,    
2012$ 1,319  54
2013  1,216  55
2014  1,075  3
2015  872  3
2016  717  3
Thereafter  3,239  17
 Total minimum lease payments$ 8,438  135
Executory costs  $ (9)
Amounts representing interest    (10)
Present value of net minimum    
 lease payments  $ 116
Components of Other Assets
         
         
       December 31,
(in millions)  2011 2010
Nonmarketable equity investments:  
 Cost method:   
  Private equity investments$ 3,444 3,240
  Federal bank stock  4,617 5,254
   Total cost method  8,061 8,494
 LIHTC investments - equity method (1)  4,077 3,611
 All other equity method  4,434 4,013
 Principal investments (2)  236 305
    Total nonmarketable    
     equity investments 16,808 16,423
Corporate/bank-owned life insurance  20,146 19,845
Accounts receivable  25,939 23,763
Interest receivable  5,296 4,895
Core deposit intangibles  7,311 8,904
Customer relationship and    
 other amortized intangibles  1,639 1,847
Foreclosed assets:   
 GNMA (3)  1,319 1,479
 Other  3,342 4,530
Operating lease assets  1,825 1,873
Due from customers on acceptances 225 229
Other  17,172 15,993
     Total other assets$ 101,022 99,781
         

(1)       Represents low income housing tax credit investments.

(2)       Principal investments are recorded at fair value with realized and unrealized gains (losses) included in net gains (losses) from equity investments in the income statement.        

(3)       These are foreclosed real estate securing FHA insured and VA guaranteed loans. Both principal and interest for these loans secured by the foreclosed real estate are collectible because they are insured/guaranteed.
Income Related to Nonmarketable Equity Investments
         
         
      Year ended December 31,
(in millions)  2011 2010 2009
Net gains (losses) from:    
 Private equity investments$ 813 492 (368)
 Principal investments  29 42 79
All other nonmarketable    
 equity investments  (298) (188) (234)
  Total$ 544 346 (523)