Income Taxes - US and non-US components (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. and non-U.S. components of income before income tax expense/(benefit) and extraordinary gain
U.S.	$ 17,229	$ 24,895	$ 16,336
Non-U.S.	8,685	4,022	10,413
Income before income tax expense	$ 25,914	$ 28,917	$ 26,749