Payment Status for the LHFI Portfolio (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	$ 118,661		$ 116,015
Accruing 30-89 Days Past Due	1,291		1,549
Accruing 90+ Days Past Due	2,150		2,028
Nonaccruing	2,458	[1]	2,903	[2]
Total	124,560	[3]	122,495	[3]
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	52,030		49,538
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,825		5,094
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	959		1,240
Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	24,405	[4]	23,243	[4]
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	15,281		15,765
Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	853		980
Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,225		2,059
Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,506		10,165
Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	565		540
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	57,008		54,838
Accruing 30-89 Days Past Due	86		96
Accruing 90+ Days Past Due	25		12
Nonaccruing	695	[1]	926	[2]
Total	57,814		55,872
Commercial Portfolio Segment [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	51,600		49,098
Accruing 30-89 Days Past Due	76		80
Accruing 90+ Days Past Due	23		12
Nonaccruing	331	[1]	348	[2]
Total	52,030		49,538
Commercial Portfolio Segment [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	4,582		4,797
Accruing 30-89 Days Past Due	8		9
Accruing 90+ Days Past Due	2		0
Nonaccruing	233	[1]	288	[2]
Total	4,825		5,094
Commercial Portfolio Segment [Member] | Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	826		943
Accruing 30-89 Days Past Due	2		7
Accruing 90+ Days Past Due	0		0
Nonaccruing	131	[1]	290	[2]
Total	959		1,240
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	42,710		42,855
Accruing 30-89 Days Past Due	557		726
Accruing 90+ Days Past Due	1,193		1,129
Nonaccruing	1,742	[1]	1,950	[2]
Total	46,202		46,660
Residential Portfolio Segment [Member] | Residential Guaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	4,357		5,394
Accruing 30-89 Days Past Due	144		176
Accruing 90+ Days Past Due	1,162		1,102
Nonaccruing	0	[1]	0	[2]
Total	5,663		6,672
Residential Portfolio Segment [Member] | Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	22,834	[5]	21,501	[6]
Accruing 30-89 Days Past Due	255	[5]	324	[6]
Accruing 90+ Days Past Due	30	[5]	26	[6]
Nonaccruing	1,286	[1],[5]	1,392	[2],[6]
Total	24,405	[5]	23,243	[6]
Residential Portfolio Segment [Member] | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	14,828		15,223
Accruing 30-89 Days Past Due	151		204
Accruing 90+ Days Past Due	0		0
Nonaccruing	302	[1]	338	[2]
Total	15,281		15,765
Residential Portfolio Segment [Member] | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	691		737
Accruing 30-89 Days Past Due	7		22
Accruing 90+ Days Past Due	1		1
Nonaccruing	154	[1]	220	[2]
Total	853		980
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	18,943		18,322
Accruing 30-89 Days Past Due	648		727
Accruing 90+ Days Past Due	932		887
Nonaccruing	21	[1]	27	[2]
Total	20,544		19,963
Consumer Portfolio Segment [Member] | Guaranteed Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	5,746		5,690
Accruing 30-89 Days Past Due	583		640
Accruing 90+ Days Past Due	919		869
Nonaccruing	0	[1]	0	[2]
Total	7,248		7,199
Consumer Portfolio Segment [Member] | Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	2,201		2,032
Accruing 30-89 Days Past Due	14		14
Accruing 90+ Days Past Due	6		6
Nonaccruing	4	[1]	7	[2]
Total	2,225		2,059
Consumer Portfolio Segment [Member] | Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	10,443		10,074
Accruing 30-89 Days Past Due	45		66
Accruing 90+ Days Past Due	1		5
Nonaccruing	17	[1]	20	[2]
Total	10,506		10,165
Consumer Portfolio Segment [Member] | Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current	553		526
Accruing 30-89 Days Past Due	6		7
Accruing 90+ Days Past Due	6		7
Nonaccruing	0	[1]	0	[2]
Total	$ 565		$ 540

[1] Total nonaccruing loans past due 90 days or more totaled $2.0 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 VIEs390 3,322

[4] Excludes $5.7 billion and $6.7 billion at June 30, 2012 and December 31, 2011, respectively, of guaranteed residential loans. At both June 30, 2012 and December 31, 2011, the majority of these loans had FICO scores of 700 and above.

[5] Includes $405 million of loans carried at fair value.

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