Payment Status for the LHFI Portfolio (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	$ 119,023		$ 118,008
Accruing 30-89 Days Past Due	862		1,133
Accruing 90+ Days Past Due	1,005		782
Nonaccruing	1,141	[1]	1,547	[2]
Total	122,031	[3]	121,470	[3]
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	55,070		54,048
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,308		4,127
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	667		713
Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	23,341	[4]	23,389	[4]
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	14,682	[4]	14,805	[4]
Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	635	[4]	753	[4]
Guaranteed Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,400		5,400
Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,483	[5]	2,396	[5]
Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11,151	[5]	10,998	[5]
Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	641	[5]	632	[5]
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	59,630		58,476
Accruing 30-89 Days Past Due	93		92
Accruing 90+ Days Past Due	18		26
Nonaccruing	304	[1]	294	[2]
Total	60,045		58,888
Commercial Portfolio Segment [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	54,748		53,747
Accruing 30-89 Days Past Due	78		81
Accruing 90+ Days Past Due	17		26
Nonaccruing	227	[1]	194	[2]
Total	55,070		54,048
Commercial Portfolio Segment [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	4,238		4,050
Accruing 30-89 Days Past Due	15		11
Accruing 90+ Days Past Due	1		0
Nonaccruing	54	[1]	66	[2]
Total	4,308		4,127
Commercial Portfolio Segment [Member] | Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	644		679
Accruing 30-89 Days Past Due	0		0
Accruing 90+ Days Past Due	0		0
Nonaccruing	23	[1]	34	[2]
Total	667		713
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	40,494		40,863
Accruing 30-89 Days Past Due	323		395
Accruing 90+ Days Past Due	638		713
Nonaccruing	825	[1]	1,228	[2]
Total	42,280		43,199
Residential Portfolio Segment [Member] | Residential Guaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	2,967		3,523
Accruing 30-89 Days Past Due	38		39
Accruing 90+ Days Past Due	617		690
Nonaccruing	0	[1]	0	[2]
Total	3,622		4,252
Residential Portfolio Segment [Member] | Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	22,643	[6]	22,401	[7]
Accruing 30-89 Days Past Due	163	[6]	192	[7]
Accruing 90+ Days Past Due	19	[6]	21	[7]
Nonaccruing	516	[1],[6]	775	[2],[7]
Total	23,341	[6]	23,389	[7]
Residential Portfolio Segment [Member] | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	14,341		14,314
Accruing 30-89 Days Past Due	115		149
Accruing 90+ Days Past Due	1		1
Nonaccruing	225	[1]	341	[2]
Total	14,682		14,805
Residential Portfolio Segment [Member] | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	543		625
Accruing 30-89 Days Past Due	7		15
Accruing 90+ Days Past Due	1		1
Nonaccruing	84	[1]	112	[2]
Total	635		753
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	18,899		18,669
Accruing 30-89 Days Past Due	446		646
Accruing 90+ Days Past Due	349		43
Nonaccruing	12	[1]	25	[2]
Total	19,706		19,383
Consumer Portfolio Segment [Member] | Guaranteed Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	4,715		4,769
Accruing 30-89 Days Past Due	375		556
Accruing 90+ Days Past Due	341		32
Nonaccruing	0	[1]	0	[2]
Total	5,431		5,357
Consumer Portfolio Segment [Member] | Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	2,462		2,372
Accruing 30-89 Days Past Due	16		15
Accruing 90+ Days Past Due	1		3
Nonaccruing	4	[1]	6	[2]
Total	2,483		2,396
Consumer Portfolio Segment [Member] | Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	11,093		10,909
Accruing 30-89 Days Past Due	49		68
Accruing 90+ Days Past Due	1		2
Nonaccruing	8	[1]	19	[2]
Total	11,151		10,998
Consumer Portfolio Segment [Member] | Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	629		619
Accruing 30-89 Days Past Due	6		7
Accruing 90+ Days Past Due	6		6
Nonaccruing	0	[1]	0	[2]
Total	$ 641		$ 632

[1] 2Nonaccruing loans past due 90 days or more totaled $789 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 loans past due 90 days or more totaled $975 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.

[3] 2 Includes loans of consolidated VIEs345 365

[4] Excludes $3.6 billion and $4.3 billion at June 30, 2013 and December 31, 2012, respectively, of guaranteed residential loans. At June 30, 2013 and December 31, 2012, the majority of these loans had FICO scores of 700 and above.

[5] Excludes $5.4 billion of guaranteed student loans at June 30, 2013 and December 31, 2012

[6] 1Includes $339 million of loans carried at fair value, the majority of which were accruing current.

[7] Includes $379 million of loans carried at fair value, the majority of which were accruing current.