Fair Value Measurement - Impact of Credit Adjustments (Details 6) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Impact of credit adjustments on earnings [Abstract]
Derivatives CVA	$ (3,270)	$ (527)	$ (2,983)	$ (1,441)
Derivatives DVA	984	(247)	938	44
Structured notes DVA	$ 901	$ (246)	$ 1,066	$ 450