Business Segment Reporting (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Average total assets	$ 172,537		$ 177,915		$ 172,175		$ 177,385
Average total liabilities	151,265		157,443		150,980		157,021
Average total equity	21,272		20,472		21,195		20,364
Net, interest income	1,211		1,274		2,432		2,585
FTE adjustment	31		32		61		63
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	1,242	[1]	1,306	[1]	2,493	[1]	2,648	[1]
Provision for Loan, Lease, and Other Losses	146		300	[2]	358	[2]	617	[2]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	1,096		1,006		2,135		2,031
Total noninterest income	858		940		1,721		1,816
Noninterest Expense	1,397		1,546		2,760		3,087
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	557		400		1,096		760
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	177		123	[3]	358	[3]	223	[3]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	380		277		738		537
Net Income (Loss) Attributable to Noncontrolling Interest	3		2		9		12
Net Income (Loss) Attributable to Parent	377		275		729		525
Consumer Banking and Private Wealth Management [Member]
Average total assets	45,012		47,161		45,065		47,114
Average total liabilities	84,791		85,333		85,096		85,059
Average total equity	0		0		0		0
Net, interest income	646		682		1,293		1,367
FTE adjustment	0		0		0		0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	646	[1]	682	[1]	1,293	[1]	1,367	[1]
Provision for Loan, Lease, and Other Losses	99		128	[2]	207	[2]	292	[2]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	547		554		1,086		1,075
Total noninterest income	372		389		729		761
Noninterest Expense	690		756		1,392		1,528
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	229		187		423		308
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	84		67	[3]	155	[3]	111	[3]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	145		120		268		197
Net Income (Loss) Attributable to Noncontrolling Interest	0		0		0		0
Net Income (Loss) Attributable to Parent	145		120		268		197
Wholesale Banking [Member]
Average total assets	66,498		63,870		66,083		63,343
Average total liabilities	46,561		45,987		46,873		47,017
Average total equity	0		0		0		0
Net, interest income	397		376		783		746
FTE adjustment	29		32		58		61
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	426	[1]	408	[1]	841	[1]	807	[1]
Provision for Loan, Lease, and Other Losses	18		57	[2]	46	[2]	148	[2]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	408		351		795		659
Total noninterest income	333		334		639		664
Noninterest Expense	405		450		801		897
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	336		235		633		426
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	105		67	[3]	195	[3]	116	[3]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	231		168		438		310
Net Income (Loss) Attributable to Noncontrolling Interest	1		0		4		8
Net Income (Loss) Attributable to Parent	230		168		434		302
Mortgage Banking
Average total assets	32,711		35,787		32,947		35,511
Average total liabilities	4,429		4,347		4,383		4,088
Average total equity	0		0		0		0
Net, interest income	141		131		269		257
FTE adjustment	0		0		0		0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	141	[1]	131	[1]	269	[1]	257	[1]
Provision for Loan, Lease, and Other Losses	61		165	[2]	152	[2]	331	[2]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	80		(34)		117		(74)
Total noninterest income	131		179		329		336
Noninterest Expense	339		343		609		676
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(128)		(198)		(163)		(414)
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	(52)		(82)	[3]	(67)	[3]	(168)	[3]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(76)		(116)		(96)		(246)
Net Income (Loss) Attributable to Noncontrolling Interest	0		0		0		0
Net Income (Loss) Attributable to Parent	(76)		(116)		(96)		(246)
Corporate Other
Average total assets	26,880		29,324		26,578		30,077
Average total liabilities	15,609		21,956		14,754		21,182
Average total equity	0		0		0		0
Net, interest income	72		94		157		221
FTE adjustment	2		1		3		2
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	74	[1]	95	[1]	160	[1]	223	[1]
Provision for Loan, Lease, and Other Losses	0		0	[2]	0	[2]	0	[2]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	74		95		160		223
Total noninterest income	26		40		31		61
Noninterest Expense	(33)		(2)		(35)		(7)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	133		137		226		291
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	43		53	[3]	71	[3]	102	[3]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	90		84		155		189
Net Income (Loss) Attributable to Noncontrolling Interest	2		3		5		5
Net Income (Loss) Attributable to Parent	88		81		150		184
Reconciling Items
Average total assets	1,436		1,773		1,502		1,340
Average total liabilities	(125)		(180)		(126)		(325)
Average total equity	21,272		20,472		21,195		20,364
Net, interest income	(45)		(9)		(70)		(6)
FTE adjustment	0		(1)		0		0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	(45)	[1]	(10)	[1]	(70)	[1]	(6)	[1]
Provision for Loan, Lease, and Other Losses	(32)		(50)	[2]	(47)	[2]	(154)	[2]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	(13)		40		(23)		148
Total noninterest income	(4)		(2)		(7)		(6)
Noninterest Expense	(4)		(1)		(7)		(7)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(13)		39		(23)		149
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	(3)		18	[3]	4	[3]	62	[3]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(10)		21		(27)		87
Net Income (Loss) Attributable to Noncontrolling Interest	0		(1)		0		(1)
Net Income (Loss) Attributable to Parent	$ (10)		$ 22		$ (27)		$ 88

[1] 1 Presented on a matched maturity funds transfer price basis for the segments.

[2] 2 Provision for credit losses represents net charge-offs for the segments.

[3] 3 Includes regular income tax provision/(benefit) and taxable-equivalent income adjustment reversal.