v2.4.0.6
Other Assets (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Components of Other Assets [Line Items]      
Cost method investments $ 8,162   $ 8,061
Equity method investments 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
Customer relationship and other amortized intangibles 9,608   10,358
Operating lease assets 1,803   1,825
Due from customers on acceptances 294   225
Other 13,416   17,172
Other assets 95,535   101,022
Income Related to Nonmarketable Equity Investments [Abstract]      
Net gains from private equity investments 131 239  
All other 21 (60)  
Total 152 179  
Government insured or guaranteed [Member]
      
Components of Other Assets [Line Items]      
Foreclosed assets 1,352   1,319
Non-government insured or guaranteed [Member]
      
Components of Other Assets [Line Items]      
Foreclosed assets 3,265   3,342
Core deposit intangibles [Member]
      
Components of Other Assets [Line Items]      
Customer relationship and other amortized intangibles 6,962   7,311
Customer Relationships And Other [Member]
      
Components of Other Assets [Line Items]      
Customer relationship and other amortized intangibles 1,572   1,639
Federal Bank Stock [Member]
      
Components of Other Assets [Line Items]      
Cost method investments 4,553   4,617
Private Equity Investments [Member]
      
Components of Other Assets [Line Items]      
Cost method investments 3,609   3,444
Equity method investments 4,767   4,670
Low Income Housing Tax Credit Investments [Member]
      
Components of Other Assets [Line Items]      
Equity method investments $ 4,073   $ 4,077