Segment Reporting (Table) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net interest income	$ 2,258	$ 2,526	$ 4,647	$ 4,817
Noninterest income	1,806	1,097	3,372	2,538
Total revenue	4,064	3,623	8,019	7,355
Provision for credit losses (benefit)	157	256	393	441
Depreciation and amortization	177	177	352	344
Other noninterest expense	2,258	2,471	4,478	4,759
Income before income taxes and noncontrolling interests	1,472	719	2,796	1,811
Income taxes (benefit)	349	173	669	454
Net income	1,123	546	2,127	1,357
Average Assets	302,027	296,151	302,732	288,847
Retail Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	1,012	1,114	2,061	2,158
Noninterest income	542	437	976	828
Total revenue	1,554	1,551	3,037	2,986
Provision for credit losses (benefit)	148	165	310	300
Depreciation and amortization	45	48	92	94
Other noninterest expense	1,111	1,123	2,195	2,146
Income before income taxes and noncontrolling interests	250	215	440	446
Income taxes (benefit)	92	79	162	163
Net income	158	136	278	283
Inter-segment revenue	2		2
Average Assets	74,516	73,093	74,317	71,420
Corporate & Institutional Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	912	1,059	1,838	1,975
Noninterest income	477	354	862	682
Total revenue	1,389	1,413	2,700	2,657
Provision for credit losses (benefit)	(40)	33	(26)	52
Depreciation and amortization	32	34	64	67
Other noninterest expense	467	462	915	892
Income before income taxes and noncontrolling interests	930	884	1,747	1,646
Income taxes (benefit)	318	307	594	574
Net income	612	577	1,153	1,072
Inter-segment revenue	5	9	11	18
Average Assets	112,207	102,835	111,941	97,866
Asset Management Group [Member]
Segment Reporting Information [Line Items]
Net interest income	70	75	143	150
Noninterest income	184	165	366	333
Total revenue	254	240	509	483
Provision for credit losses (benefit)	1	(1)	6	9
Depreciation and amortization	11	10	21	20
Other noninterest expense	184	171	357	337
Income before income taxes and noncontrolling interests	58	60	125	117
Income taxes (benefit)	22	22	46	43
Net income	36	38	79	74
Inter-segment revenue	3	3	6	6
Average Assets	7,289	6,659	7,210	6,613
Residential Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	51	53	99	104
Noninterest income	177	(162)	420	80
Total revenue	228	(109)	519	184
Provision for credit losses (benefit)	4	(2)	24	(9)
Depreciation and amortization	3	2	6	5
Other noninterest expense	189	228	386	428
Income before income taxes and noncontrolling interests	32	(337)	103	(240)
Income taxes (benefit)	12	(124)	38	(88)
Net income	20	(213)	65	(152)
Inter-segment revenue	2	2	3	4
Average Assets	10,407	11,501	10,604	11,745
BlackRock [Member]
Segment Reporting Information [Line Items]
Noninterest income	149	111	287	227
Total revenue	149	111	287	227
Income before income taxes and noncontrolling interests	149	111	287	227
Income taxes (benefit)	37	23	67	49
Net income	112	88	220	178
Inter-segment revenue	4	4	8	7
Average Assets	5,982	5,597	5,982	5,597
Non Strategic Assets [Member]
Segment Reporting Information [Line Items]
Net interest income	164	221	367	438
Noninterest income	11	2	27	(17)
Total revenue	175	223	394	421
Provision for credit losses (benefit)	39	50	81	68
Other noninterest expense	41	67	93	135
Income before income taxes and noncontrolling interests	95	106	220	218
Income taxes (benefit)	35	39	81	80
Net income	60	67	139	138
Inter-segment revenue	(3)	(3)	(5)	(5)
Average Assets	10,290	12,690	10,511	12,407
All Other Segments [Member]
Segment Reporting Information [Line Items]
Net interest income	49	4	139	(8)
Noninterest income	266	190	434	405
Total revenue	315	194	573	397
Provision for credit losses (benefit)	5	11	(2)	21
Depreciation and amortization	86	83	169	158
Other noninterest expense	266	420	532	821
Income before income taxes and noncontrolling interests	(42)	(320)	(126)	(603)
Income taxes (benefit)	(167)	(173)	(319)	(367)
Net income	125	(147)	193	(236)
Inter-segment revenue	(13)	(15)	(25)	(30)
Average Assets	$ 81,336	$ 83,776	$ 82,167	$ 83,199