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, 2013
Dec. 31, 2012
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets $ 191,234 $ 227,775
Trading account liabilities 82,381 73,587
U.S. government and agency securities [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 54,409 [1] 86,974 [1]
Trading account liabilities 21,868 23,430
Government sponsored enterprise obligations [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 15,200 30,600
Corporate securities, trading loans and other [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 34,557 37,900
Equity securities [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 44,075 43,315
Trading account liabilities 25,952 22,492
Non-U.S. sovereign debt [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 42,943 42,746
Trading account liabilities 25,127 20,244
Mortgage trading loans and ABS [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account assets 15,250 16,840
Corporate securities and other [Member]
    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Trading account liabilities $ 9,434 $ 7,421
[1] Includes $15.2 billion and $30.6 billion of government-sponsored enterprise obligations at June 30, 2013 and December 31, 2012.