Payment Status for the LHFI Portfolio (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	$ 116,531		$ 116,015
Accruing 30-89 Days Past Due	1,359		1,549
Accruing 90+ Days Past Due	2,152		2,028
Nonaccruing	2,649	[1]	2,903	[2]
Total	122,691	[3]	122,495	[3]
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	50,189		49,538
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,910		5,094
Commercial Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,086		1,240
Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	23,653	[4]	23,243	[4]
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	15,472		15,765
Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	924		980
Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,688	[5]	1,610	[5]
Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,145		10,165
Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	527		540
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	55,273		54,838
Accruing 30-89 Days Past Due	85		96
Accruing 90+ Days Past Due	12		12
Nonaccruing	815	[1]	926	[2]
Total	56,185		55,872
Commercial Portfolio Segment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	49,771		49,098
Accruing 30-89 Days Past Due	69		80
Accruing 90+ Days Past Due	12		12
Nonaccruing	337	[1]	348	[2]
Total	50,189		49,538
Commercial Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	4,617		4,797
Accruing 30-89 Days Past Due	13		9
Accruing 90+ Days Past Due	0		0
Nonaccruing	280	[1]	288	[2]
Total	4,910		5,094
Commercial Portfolio Segment | Commercial Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	885		943
Accruing 30-89 Days Past Due	3		7
Accruing 90+ Days Past Due	0		0
Nonaccruing	198	[1]	290	[2]
Total	1,086		1,240
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	42,893		42,855
Accruing 30-89 Days Past Due	628		726
Accruing 90+ Days Past Due	1,163		1,129
Nonaccruing	1,812	[1]	1,950	[2]
Total	46,496		46,660
Residential Mortgage Loans | Residential Guaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	5,187		5,394
Accruing 30-89 Days Past Due	133		176
Accruing 90+ Days Past Due	1,127		1,102
Nonaccruing	0	[1]	0	[2]
Total	6,447		6,672
Residential Mortgage Loans | Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	22,025	[6]	21,501	[7]
Accruing 30-89 Days Past Due	303	[6]	324	[7]
Accruing 90+ Days Past Due	34	[6]	26	[7]
Nonaccruing	1,291	[1],[6]	1,392	[2],[7]
Total	23,653	[6]	23,243	[7]
Residential Mortgage Loans | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	14,984		15,223
Accruing 30-89 Days Past Due	170		204
Accruing 90+ Days Past Due	1		0
Nonaccruing	317	[1]	338	[2]
Total	15,472		15,765
Residential Mortgage Loans | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	697		737
Accruing 30-89 Days Past Due	22		22
Accruing 90+ Days Past Due	1		1
Nonaccruing	204	[1]	220	[2]
Total	924		980
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	18,365		18,322
Accruing 30-89 Days Past Due	646		727
Accruing 90+ Days Past Due	977		887
Nonaccruing	22	[1]	27	[2]
Total	20,010		19,963
Consumer Portfolio Segment | Guaranteed Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	5,638		5,690
Accruing 30-89 Days Past Due	587		640
Accruing 90+ Days Past Due	961		869
Nonaccruing	0	[1]	0	[2]
Total	7,186		7,199
Consumer Portfolio Segment | Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	2,125		2,032
Accruing 30-89 Days Past Due	16		14
Accruing 90+ Days Past Due	5		6
Nonaccruing	6	[1]	7	[2]
Total	2,152		2,059
Consumer Portfolio Segment | Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	10,088		10,074
Accruing 30-89 Days Past Due	37		66
Accruing 90+ Days Past Due	4		5
Nonaccruing	16	[1]	20	[2]
Total	10,145		10,165
Consumer Portfolio Segment | Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	514		526
Accruing 30-89 Days Past Due	6		7
Accruing 90+ Days Past Due	7		7
Nonaccruing	0	[1]	0	[2]
Total	$ 527		$ 540

[1] Total nonaccruing loans past due 90 days or more totaled $2.2 billion. Nonaccruing loans past due fewer than 90 days include modified nonaccrual loans reported as TDRs.

[2] Total nonaccruing loans past due 90 days or more totaled $2.3 billion. Nonaccruing loans past due fewer than 90 days include modified nonaccrual loans reported as TDRs.

[3] Includes loans of consolidated VIEs1,378 3,322

[4] Excludes $6.4 billion and $6.7 billion at March 31, 2012 and December 31, 2011, respectively, of guaranteed residential loans. At both March 31, 2012 and December 31, 2011, the majority of these loans had FICO scores of 700 and above.

[5] Excludes $464 million and $449 million as of March 31, 2012 and December 31, 2011, respectively, of private-label student loans with third party insurance. At March 31, 2012 and December 31, 2011, the majority of these loans had FICO scores of 700 and above.

[6] Includes $411 million of loans carried at fair value.

[7] Includes $431 million of loans carried at fair value.