Business Segment Reporting (Detail) $ in Millions		12 Months Ended
		Dec. 31, 2016 USD ($) segments	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Number of Operating Segments | segments		3
Segment Reporting Information Average Total Loans		$ 141,118	$ 133,558	$ 130,874
Segment Reporting Information Average Total Deposits		154,189	144,202	132,012
Average total assets		199,004	188,892	182,176
Average total liabilities		174,936	165,546	160,006
Average total equity		24,068	23,346	22,170
Net, interest income		5,221	4,764	4,840
FTE adjustment		138	142	142
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	[1]	5,359	4,906	4,982
Provision for Loan, Lease, and Other Losses	[2]	444	165	342
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment		4,915	4,741	4,640
Total noninterest income		3,383	3,268	3,323
Noninterest Expense		5,468	5,160	5,543
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		2,830	2,849	2,420
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	[3]	943	906	635
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,887	1,943	1,785
Net Income (Loss) Attributable to Noncontrolling Interest		9	10	11
Net Income (Loss) Attributable to Parent		1,878	1,933	1,774
Consumer Banking and Private Wealth Management [Member]
Segment Reporting Information Average Total Loans		42,723	40,614	41,702
Segment Reporting Information Average Total Deposits		95,875	91,104	86,046
Average total assets		48,415	46,513	47,430
Average total liabilities		96,466	91,747	86,774
Average total equity		0	0	0
Net, interest income		2,857	2,728	2,628
FTE adjustment		0	1	1
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	[1]	2,857	2,729	2,629
Provision for Loan, Lease, and Other Losses	[2]	185	137	191
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment		2,672	2,592	2,438
Total noninterest income		1,472	1,507	1,527
Noninterest Expense		3,056	2,939	2,904
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		1,088	1,160	1,061
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	[3]	404	431	390
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		684	729	671
Net Income (Loss) Attributable to Noncontrolling Interest		0	0	0
Net Income (Loss) Attributable to Parent		684	729	671
Wholesale Banking [Member]
Segment Reporting Information Average Total Loans		71,605	67,872	62,627
Segment Reporting Information Average Total Deposits		55,293	50,379	43,569
Average total assets		85,513	80,915	74,093
Average total liabilities		61,050	56,050	50,294
Average total equity		0	0	0
Net, interest income		1,849	1,781	1,661
FTE adjustment		136	138	139
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	[1]	1,985	1,919	1,800
Provision for Loan, Lease, and Other Losses	[2]	272	137	71
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment		1,713	1,782	1,729
Total noninterest income		1,234	1,180	1,063
Noninterest Expense		1,693	1,551	1,473
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		1,254	1,411	1,319
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	[3]	387	459	423
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		867	952	896
Net Income (Loss) Attributable to Noncontrolling Interest		0	0	0
Net Income (Loss) Attributable to Parent		867	952	896
Mortgage Banking
Segment Reporting Information Average Total Loans		26,726	25,024	26,494
Segment Reporting Information Average Total Deposits		2,969	2,679	2,333
Average total assets		30,697	28,692	30,386
Average total liabilities		3,344	3,048	2,665
Average total equity		0	0	0
Net, interest income		448	483	552
FTE adjustment		0	0	0
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	[1]	448	483	552
Provision for Loan, Lease, and Other Losses	[2]	(13)	(110)	81
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment		461	593	471
Total noninterest income		559	460	473
Noninterest Expense		732	681	1,048
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		288	372	(104)
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	[3]	105	85	(52)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		183	287	(52)
Net Income (Loss) Attributable to Noncontrolling Interest		0	0	0
Net Income (Loss) Attributable to Parent		183	287	(52)
Corporate Other [Member]
Segment Reporting Information Average Total Loans		66	60	56
Segment Reporting Information Average Total Deposits		124	101	112
Average total assets		31,939	29,655	27,125
Average total liabilities		14,148	14,771	20,283
Average total equity		0	0	0
Net, interest income		96	147	275
FTE adjustment		2	3	3
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	[1]	98	150	278
Provision for Loan, Lease, and Other Losses	[2]	0	0	0
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment		98	150	278
Total noninterest income		136	135	278
Noninterest Expense		5	4	134
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		229	281	422
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	[3]	59	82	(26)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		170	199	448
Net Income (Loss) Attributable to Noncontrolling Interest		9	9	11
Net Income (Loss) Attributable to Parent		161	190	437
Reconciling Items
Segment Reporting Information Average Total Loans		(2)	(12)	(5)
Segment Reporting Information Average Total Deposits		(72)	(61)	(48)
Average total assets		2,440	3,117	3,142
Average total liabilities		(72)	(70)	(10)
Average total equity		24,068	23,346	22,170
Net, interest income		(29)	(375)	(276)
FTE adjustment		0	0	(1)
Segment Reporting Information Net Interest Income Including Fully Taxable Equivalent Adjustment	[1]	(29)	(375)	(277)
Provision for Loan, Lease, and Other Losses	[2]	0	1	(1)
Segment Reporting Information Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment		(29)	(376)	(276)
Total noninterest income		(18)	(14)	(18)
Noninterest Expense		(18)	(15)	(16)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		(29)	(375)	(278)
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	[3]	(12)	(151)	(100)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(17)	(224)	(178)
Net Income (Loss) Attributable to Noncontrolling Interest		0	1	0
Net Income (Loss) Attributable to Parent		$ (17)	$ (225)	$ (178)

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

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

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