Business Changes and Developments (Details 1) (USD $)	12 Months Ended				0 Months Ended
	Dec. 31, 2012 Additional Paid-in Capital [Member]	Dec. 31, 2011 Additional Paid-in Capital [Member]	Dec. 31, 2010 Additional Paid-in Capital [Member]	Jul. 01, 2010 RBS Sempra transaction	Jan. 04, 2010 Purchase of remaining interest in J.P. Morgan Cazenove Additional Paid-in Capital [Member]
Business Acquisition [Line Items]
Net assets of of RBS Sempra Commodities' global oil, global metals and European power and gas businesses acquired by JPMorgan Chase				$ 1,700,000,000
Debt of RBS Sempra Commodities' global oil, global metals and European power and gas businesses acquired by JPMorgan Chase, which was immediately repaid				3,300,000,000
Adjustments to Additional Paid in Capital, Other	$ (262,000,000)	$ (125,000,000)	$ (1,273,000,000)		$ (1,300,000,000)