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
Jun. 30, 2012
Dec. 31, 2011
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets $ 204,725 $ 169,319
Trading account liabilities 77,458 60,508
U.S. government and agency securities [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 76,234 [1] 52,613 [1]
Trading account liabilities 23,959 20,710
Government sponsored enterprise obligations [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 26,500 27,300
Corporate securities, trading loans and other [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 32,089 36,571
Equity securities [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 29,518 23,674
Trading account liabilities 25,016 14,594
Non-U.S. sovereign debt [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 51,279 42,946
Trading account liabilities 19,137 17,440
Mortgage trading loans and ABS [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 15,605 13,515
Corporate securities and other [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account liabilities $ 9,346 $ 7,764
[1] Includes $26.5 billion and $27.3 billion of government-sponsored enterprise obligations at June 30, 2012 and December 31, 2011.