Fair Value Measurement - Impact of Credit Adjustments (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Impact of credit adjustments on earnings [Abstract]
Structured note credit adjustments	$ (271)	$ (835)	$ 927
Credit Valuation Adjustment [Member]
Impact of credit adjustments on earnings [Abstract]
Derivative credit adjustments	1,886	2,698	(2,574)
Debit Valuation Adjustment and Funding Valuation Adjustment] [Member]
Impact of credit adjustments on earnings [Abstract]
Derivative credit adjustments	(1,152)
Structured note credit adjustments	(760)
Debit valuation adjustment [Member]
Impact of credit adjustments on earnings [Abstract]
Derivative credit adjustments	(115)	(590)	538
Structured note credit adjustments	$ (337)	$ (340)	$ 899