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Fair Value Measurement - Credit Adjustments Reflected on Balance Sheet (Details 5) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Credit adjustments [Abstract]  
Derivative receivables balance$ 108,853$ 80,481
Derivatives CVA(7,345)(4,362)
Derivative payables79,24969,219
Derivatives DVA(1,820)(882)
Structured notes balance50,06253,139
Structured notes DVA$ (2,219)$ (1,153)