Derivatives and Hedging Activities (Details 2) (USD $) In Millions	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	$ 644,772	$ 641,556	$ 637,514
Total financial liabilities at fair value	388,492		381,604
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
Cross-Level Netting [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	(1,937)		(1,768)
Total financial liabilities at fair value	(1,937)		(1,768)
Cash collateral netting [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	(102,907)		(110,317)
Total financial liabilities at fair value	(15,660)		(15,720)
Level 3 [Member] | Counterparty Netting [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	(4,289)		(4,806)
Total financial liabilities at fair value	(4,289)		(4,806)
Counterparty Netting [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	(582,524)		(620,553)
Total financial liabilities at fair value	(582,524)		(620,553)
Counterparty Netting [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	0		0
Total financial liabilities at fair value	0		0
Counterparty Netting [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	(576,298)		(613,979)
Total financial liabilities at fair value	(576,298)		(613,979)
Level 3 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	81		455
Total financial liabilities at fair value	273		262
Level 1 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	90		49
Total financial liabilities at fair value	41		18
Level 2 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	451,134		486,037
Total financial liabilities at fair value	388,437		422,267
Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	451,305		486,541
Total financial liabilities at fair value	388,751		422,547
Level 3 [Member] | Credit Risk Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	10,211		11,634
Total financial liabilities at fair value	4,192		4,594
Level 1 [Member] | Credit Risk Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	0		0
Total financial liabilities at fair value	0		0
Level 2 [Member] | Credit Risk Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	109,832		115,519
Total financial liabilities at fair value	96,137		99,813
Credit Risk Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	120,043		127,153
Total financial liabilities at fair value	100,329		104,407
Level 3 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	2,090		1,807
Total financial liabilities at fair value	967		709
Level 1 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	0		0
Total financial liabilities at fair value	0		0
Level 2 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	82,194		86,158
Total financial liabilities at fair value	66,354		69,726
Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	84,284		87,965
Total financial liabilities at fair value	67,321		70,435
Level 3 [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	1,756		2,178
Total financial liabilities at fair value	1,572		1,957
Level 1 [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	0		0
Total financial liabilities at fair value	0		0
Level 2 [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	33,592		34,511
Total financial liabilities at fair value	35,896		39,709
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	35,348		36,689
Total financial liabilities at fair value	37,468		41,666
Level 3 [Member] | Equity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	1,673		1,504
Total financial liabilities at fair value	2,576		2,494
Level 1 [Member] | Equity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	67		44
Total financial liabilities at fair value	19		27
Level 2 [Member] | Equity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	66,235		64,267
Total financial liabilities at fair value	49,212		49,427
Equity Contract [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	67,975		65,815
Total financial liabilities at fair value	51,807		51,948
Level 3 [Member] | Gross Fair Value of Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	15,811		17,578
Total financial liabilities at fair value	9,580		10,016
Level 1 [Member] | Gross Fair Value of Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	157		93
Total financial liabilities at fair value	60		45
Level 2 [Member] | Gross Fair Value of Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	742,987		786,492
Total financial liabilities at fair value	636,036		680,942
Gross Fair Value of Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	758,955		804,163
Total financial liabilities at fair value	645,676		691,003
Derivative Net Of Counterparty Netting [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	176,431		183,610
Total financial liabilities at fair value	63,152		70,450
Level 3 [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	11,522		12,772
Total financial liabilities at fair value	5,291		5,210
Level 1 [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	157		93
Total financial liabilities at fair value	60		45
Level 2 [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	166,689		172,513
Total financial liabilities at fair value	59,738		66,963
Derivative [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
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
Level 1 [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	147,725		137,687
Total financial liabilities at fair value	89,291		75,713
Level 2 [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	554,884		566,535
Total financial liabilities at fair value	290,923		299,325
Level 3 [Member]
Fair Value, Assets and Liabilities Measured On A Recurring Basis
Total financial assets at fair value	47,007	45,843	45,377
Total financial liabilities at fair value	$ 25,875		$ 24,054