Derivatives and Hedging Activities (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Net Derivatives
Exchange-traded Derivative Assets	$ 4,878	$ 7,601
Exchange-traded Derivative Liabilities	2,877	2,794
OTC Derivative Assets	68,646	65,692
OTC Derivative Liabilities	44,615	51,936
Financial instruments owned, at fair value (includes $57,687 and $51,010 pledged as collateral as of June 2011 and December 2010, respectively)	370,605	356,953
Financial instruments sold, but not yet purchased, at fair value	149,639	140,717
Derivative [Member]
Net Derivatives
Financial instruments owned, at fair value (includes $57,687 and $51,010 pledged as collateral as of June 2011 and December 2010, respectively)	73,524	73,293
Financial instruments sold, but not yet purchased, at fair value	$ 47,492	$ 54,730