Segment Reporting (Table) (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Net interest income	$ 2,175		$ 2,215		$ 6,501		$ 7,029
Noninterest income	1,369		1,383		4,276		4,244
Total revenue	3,544		3,598		10,777		11,273
Provision for credit losses (benefit)	261		486		962		2,060
Depreciation and amortization	160		158		494		515
Other noninterest expense	1,980		2,000		5,892		5,758
Income (loss) from continuing operations before income taxes and noncontrolling interests	1,143		954		3,429		2,940
Income taxes (benefit)	309		179		851		736
Income (loss) from continuing operations before noncontrolling interests	834		775		2,578		2,204
Average Assets	266,851	[1]	264,579	[1]	263,519	[1]	265,355	[1]
Retail Banking [Member]
Net interest income	820		860		2,447		2,607
Noninterest income	463		499		1,353		1,499
Total revenue	1,283		1,359		3,800		4,106
Provision for credit losses (benefit)	206		327		662		946
Depreciation and amortization	47		48		140		170
Other noninterest expense	978		991		2,907		2,838
Income (loss) from continuing operations before income taxes and noncontrolling interests	52		(7)		91		152
Income taxes (benefit)	19		(3)		32		52
Income (loss) from continuing operations before noncontrolling interests	33		(4)		59		100
Inter-segment revenue	0				1
Average Assets	66,158	[1]	67,003	[1]	66,193	[1]	67,782	[1]
Corporate & Institutional Banking [Member]
Net interest income	847		831		2,460		2,634
Noninterest income	254		237		885		904
Total revenue	1,101		1,068		3,345		3,538
Provision for credit losses (benefit)	11		(48)		12		285
Depreciation and amortization	30		33		108		105
Other noninterest expense	418		414		1,228		1,210
Income (loss) from continuing operations before income taxes and noncontrolling interests	642		669		1,997		1,938
Income taxes (benefit)	223		234		698		687
Income (loss) from continuing operations before noncontrolling interests	419		435		1,299		1,251
Inter-segment revenue	8		0		17		20
Average Assets	81,899	[1]	76,930	[1]	79,315	[1]	77,835	[1]
Asset Management Group [Member]
Net interest income	58		66		177		191
Noninterest income	159		150		488		469
Total revenue	217		216		665		660
Provision for credit losses (benefit)	(10)		(12)		(34)		11
Depreciation and amortization	10		11		30		31
Other noninterest expense	165		149		473		445
Income (loss) from continuing operations before income taxes and noncontrolling interests	52		68		196		173
Income taxes (benefit)	19		25		72		64
Income (loss) from continuing operations before noncontrolling interests	33		43		124		109
Inter-segment revenue	4		3		10		9
Average Assets	6,664	[1]	6,899	[1]	6,744	[1]	6,977	[1]
Residential Mortgage Banking [Member]
Net interest income	46		52		149		196
Noninterest income	206		232		580		568
Total revenue	252		284		729		764
Provision for credit losses (benefit)	15		21		15		(3)
Depreciation and amortization	2		1		7		3
Other noninterest expense	201		118		473		345
Income (loss) from continuing operations before income taxes and noncontrolling interests	34		144		234		419
Income taxes (benefit)	12		47		86		153
Income (loss) from continuing operations before noncontrolling interests	22		97		148		266
Inter-segment revenue	2		4		6		9
Average Assets	10,877	[1]	9,164	[1]	11,103	[1]	8,903	[1]
BlackRock [Member]
Noninterest income	122		128		351		326
Total revenue	122		128		351		326
Income (loss) from continuing operations before income taxes and noncontrolling interests	122		128		351		326
Income taxes (benefit)	30		29		80		73
Income (loss) from continuing operations before noncontrolling interests	92		99		271		253
Inter-segment revenue	4		6		12		17
Average Assets	5,441	[1]	6,275	[1]	5,441	[1]	6,275	[1]
Distressed Assets Portfolio [Member]
Net interest income	228		283		721		973
Noninterest income	10		(35)		32		(37)
Total revenue	238		248		753		936
Provision for credit losses (benefit)	45		176		278		745
Other noninterest expense	47		46		156		169
Income (loss) from continuing operations before income taxes and noncontrolling interests	146		26		319		22
Income taxes (benefit)	53		6		117		8
Income (loss) from continuing operations before noncontrolling interests	93		20		202		14
Inter-segment revenue	(2)		(3)		(7)		(10)
Average Assets	12,715	[1]	16,745	[1]	13,392	[1]	18,246	[1]
Other Segments [Member]
Net interest income	176		123		547		428
Noninterest income	155		172		587		515
Total revenue	331		295		1,134		943
Provision for credit losses (benefit)	(6)		22		29		76
Depreciation and amortization	71		65		209		206
Other noninterest expense	171		282		655		751
Income (loss) from continuing operations before income taxes and noncontrolling interests	95		(74)		241		(90)
Income taxes (benefit)	(47)		(159)		(234)		(301)
Income (loss) from continuing operations before noncontrolling interests	142		85		475		211
Inter-segment revenue	(16)		(10)		(39)		(45)
Average Assets	$ 83,097	[1]	$ 81,563	[1]	$ 81,331	[1]	$ 79,337	[1]

[1] Period-end balances for BlackRock.