Business Segment Reporting (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segments		Mar. 31, 2013
Number of Operating Segments	3
Average total assets	$ 176,971		$ 171,808
Average total liabilities	155,244		150,691
Average total equity	21,727		21,117
Net, interest income	1,204		1,221
FTE adjustment	35		30
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	1,239	[1]	1,251	[1]
Provision for Loan, Lease, and Other Losses	102		212
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	1,137		1,039
Total noninterest income	791		863
Noninterest Expense	1,357		1,353
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	571		549
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	160	[2]	191	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	411		358
Net Income (Loss) Attributable to Noncontrolling Interest	6		6
Net Income (Loss) Attributable to Parent	405		352
Consumer Banking and Private Wealth Management [Member]
Average total assets	46,943		45,376
Average total liabilities	85,374		85,786
Average total equity	0		0
Net, interest income	641		649
FTE adjustment	0		0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	641	[1]	649	[1]
Provision for Loan, Lease, and Other Losses	53	[3]	92	[3]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	588		557
Total noninterest income	361		357
Noninterest Expense	709		704
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	240		210
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	88	[2]	77	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	152		133
Net Income (Loss) Attributable to Noncontrolling Interest	0		0
Net Income (Loss) Attributable to Parent	152		133
Wholesale Banking [Member]
Average total assets	70,467		65,407
Average total liabilities	49,091		46,806
Average total equity	0		0
Net, interest income	403		389
FTE adjustment	34		29
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	437	[1]	418	[1]
Provision for Loan, Lease, and Other Losses	23	[3]	56	[3]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	414		362
Total noninterest income	322		306
Noninterest Expense	455		380
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	281		288
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	91	[2]	93	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	190		195
Net Income (Loss) Attributable to Noncontrolling Interest	1		4
Net Income (Loss) Attributable to Parent	189		191
Mortgage Banking
Average total assets	31,550		33,185
Average total liabilities	2,435		4,337
Average total equity	0		0
Net, interest income	134		127
FTE adjustment	0		0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	134	[1]	127	[1]
Provision for Loan, Lease, and Other Losses	26	[3]	64	[3]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	108		63
Total noninterest income	100		198
Noninterest Expense	187		269
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	21		(8)
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	6	[2]	(4)	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	15		(4)
Net Income (Loss) Attributable to Noncontrolling Interest	0		0
Net Income (Loss) Attributable to Parent	15		(4)
Corporate Other
Average total assets	25,192		26,272
Average total liabilities	18,400		13,890
Average total equity	0		0
Net, interest income	74		85
FTE adjustment	1		1
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	75	[1]	86	[1]
Provision for Loan, Lease, and Other Losses	0	[3]	(1)	[3]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	75		87
Total noninterest income	12		4
Noninterest Expense	10		1
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	77		90
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	(1)	[2]	28	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	78		62
Net Income (Loss) Attributable to Noncontrolling Interest	5		2
Net Income (Loss) Attributable to Parent	73		60
Reconciling Items
Average total assets	2,819		1,568
Average total liabilities	(56)		(128)
Average total equity	21,727		21,117
Net, interest income	(48)		(29)
FTE adjustment	0		0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	(48)	[1]	(29)	[1]
Provision for Loan, Lease, and Other Losses	0	[3]	1	[3]
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	(48)		(30)
Total noninterest income	(4)		(2)
Noninterest Expense	(4)		(1)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(48)		(31)
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	(24)	[2]	(3)	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(24)		(28)
Net Income (Loss) Attributable to Noncontrolling Interest	0		0
Net Income (Loss) Attributable to Parent	$ (24)		$ (28)

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

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

[3] Provision for credit losses represents net charge-offs by segment combined with an allocation to the segments of the provision attributable to quarterly changes in the allowance for loan and lease losses and unfunded commitment reserve balances.