Nonperforming Assets (Detail) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Nonaccruing	[1],[2]	$ 463	$ 634
OREO	[3]	62	99
Other repossessed assets		7	9
Loans Held-for-sale, Other		0	38
Total nonperforming assets		532	780
Commercial and Industrial Sector [Member]
Nonaccruing		122	151
Commercial Real Estate [Member]
Nonaccruing		15	21
Commercial Construction [Member]
Nonaccruing		1	1
Residential Nonguaranteed [Member]
Nonaccruing		156	254
Home Equity Line of Credit [Member]
Nonaccruing		146	174
Residential Construction [Member]
Nonaccruing		16	27
Consumer Other Direct [Member]
Nonaccruing		4	6
Consumer Indirect [Member]
Nonaccruing		$ 3	$ 0

[1] Nonaccruing loans past due 90 days or more totaled $278 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] Does not include foreclosed real estate related to loans insured by the FHA or the VA. Proceeds due from the FHA and the VA are recorded as a receivable in other assets in the Consolidated Balance Sheets until the funds are received and the property is conveyed. The receivable amount related to proceeds due from the FHA or the VA totaled $50 million and $57 million at September 30, 2015 and December 31, 2014, respectively.