Payment Status for the LHFI Portfolio (Detail) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		$ 130,484	$ 130,575
Accruing 30-89 Days Past Due		663	846
Accruing 90+ Days Past Due		910	1,057
Nonaccruing	[1],[2]	481	634
Total	[3]	132,538	133,112
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		65,518	65,246
Accruing 30-89 Days Past Due		36	36
Accruing 90+ Days Past Due		19	7
Nonaccruing		140	151
Total		65,713	65,440
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		6,038	6,716
Accruing 30-89 Days Past Due		2	3
Accruing 90+ Days Past Due		1	1
Nonaccruing		17	21
Total		6,058	6,741
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		6,058	6,741
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		73,085	73,171
Accruing 30-89 Days Past Due		38	40
Accruing 90+ Days Past Due		20	8
Nonaccruing	[1]	158	173
Total		73,301	73,392
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		1,529	1,209
Accruing 30-89 Days Past Due		0	1
Accruing 90+ Days Past Due		0	0
Nonaccruing		1	1
Total		1,530	1,211
Residential Guaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		190	176
Accruing 30-89 Days Past Due		35	34
Accruing 90+ Days Past Due		400	422
Nonaccruing		0	0
Total		625	632
Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	[4]	23,789	23,067
Accruing 30-89 Days Past Due	[4]	92	108
Accruing 90+ Days Past Due	[4]	10	14
Nonaccruing		147	254
Total	[4],[5]	24,038	23,443
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		37,800	37,634
Accruing 30-89 Days Past Due		208	250
Accruing 90+ Days Past Due		410	436
Nonaccruing	[1]	318	455
Total		38,736	38,775
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		13,443	13,989
Accruing 30-89 Days Past Due		76	101
Accruing 90+ Days Past Due		0	0
Nonaccruing		153	174
Total	[5]	13,672	14,264
Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		378	402
Accruing 30-89 Days Past Due		5	7
Accruing 90+ Days Past Due		0	0
Nonaccruing		18	27
Total	[5]	401	436
Federally Guaranteed Student Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		3,617	3,801
Accruing 30-89 Days Past Due		312	425
Accruing 90+ Days Past Due		472	601
Nonaccruing		0	0
Total		4,401	4,827
Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		5,301	4,545
Accruing 30-89 Days Past Due		21	19
Accruing 90+ Days Past Due		3	3
Nonaccruing		4	6
Total	[6]	5,329	4,573
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		19,599	19,770
Accruing 30-89 Days Past Due		417	556
Accruing 90+ Days Past Due		480	613
Nonaccruing	[1]	5	6
Total		20,501	20,945
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		9,755	10,537
Accruing 30-89 Days Past Due		78	104
Accruing 90+ Days Past Due		0	3
Nonaccruing		1	0
Total	[6]	9,834	10,644
Consumer Credit Card Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		926	887
Accruing 30-89 Days Past Due		6	8
Accruing 90+ Days Past Due		5	6
Nonaccruing		0	0
Total	[6]	$ 937	$ 901

[1] Nonaccruing loans past due 90 days or more totaled $273 million. Nonaccruing loans past due fewer than 90 days include modified nonaccrual loans reported as TDRs and performing second lien loans which are classified as nonaccrual when the first lien loan is nonperforming.

[2] Nonaccruing restructured loans are included in total nonaccrual/NPLs.

[3] Includes loans of consolidated VIEs of $266 million and $288 million at June 30, 2015 and December 31, 2014, respectively.

[4] Includes $263 million of loans carried at fair value, the majority of which were accruing current.

[5] Excludes $625 million and $632 million of guaranteed residential loans at June 30, 2015 and December 31, 2014, respectively.

[6] Excludes $4.4 billion and $4.8 billion of guaranteed student loans at June 30, 2015 and December 31, 2014, respectively.