Quarterly report pursuant to Section 13 or 15(d)

Trading Account Assets and Liabilities (Details)

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Trading Account Assets and Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets $ 211,090 $ 169,319
Trading account liabilities 72,179 60,508
U.S. government and agency securities [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 67,539 [1] 52,613 [1]
Trading account liabilities 18,651 20,710
Government sponsored enterprise obligations [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 24,600 27,300
Corporate securities, trading loans and other [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 33,912 36,571
Equity securities [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 38,825 23,674
Trading account liabilities 22,360 14,594
Non-U.S. sovereign debt [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 54,218 42,946
Trading account liabilities 22,201 17,440
Mortgage trading loans and ABS [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 16,596 13,515
Corporate securities and other [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account liabilities $ 8,967 $ 7,764
[1] Includes $24.6 billion and $27.3 billion of government-sponsored enterprise obligations at September 30, 2012 and December 31, 2011.