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Other Assets (Tables)
3 Months Ended
Mar. 31, 2012
Other Assets (Tables) [Abstract]  
Components of Other Assets
         
         
       Mar. 31,Dec. 31,
(in millions)  2012 2011
Nonmarketable equity investments:  
 Cost method:   
  Private equity investments$ 3,609 3,444
  Federal bank stock  4,553 4,617
   Total cost method  8,162 8,061
 Equity method:   
  LIHTC investments (1)  4,073 4,077
  Private equity and other  4,767 4,670
   Total equity method  8,840 8,747
    Total nonmarketable    
     equity investments 17,002 16,808
Corporate/bank-owned life insurance  20,218 20,146
Accounts receivable  24,239 25,939
Interest receivable  5,412 5,296
Core deposit intangibles  6,962 7,311
Customer relationship and    
 other amortized intangibles  1,572 1,639
Foreclosed assets:   
 GNMA (2)  1,352 1,319
 Other  3,265 3,342
Operating lease assets  1,803 1,825
Due from customers on acceptances 294 225
Other  13,416 17,172
     Total other assets$ 95,535 101,022
         

(1)       Represents low income housing tax credit investments.

(2)       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
        
        
     Quarter ended March 31,
(in millions)  2012 2011
Net gains from private equity investments$ 131 239
All other  21 (60)
 Total$ 152 179