Nonperforming Assets (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Nonaccrual/NPLs	$ 1,141	[1]	$ 1,547	[2]
OREO	198	[3]	264	[3]
Other repossessed assets	8		9
Loans Held-for-sale, Other	48		37
Total nonperforming assets	1,395		1,857
Commercial Portfolio Segment [Member]
Nonaccrual/NPLs	304	[1]	294	[2]
Commercial Portfolio Segment [Member] | Commercial and Industrial
Nonaccrual/NPLs	227	[1]	194	[2]
Commercial Portfolio Segment [Member] | Commercial Real Estate
Nonaccrual/NPLs	54	[1]	66	[2]
Commercial Portfolio Segment [Member] | Commercial Construction [Member]
Nonaccrual/NPLs	23	[1]	34	[2]
Residential Portfolio Segment [Member]
Nonaccrual/NPLs	825	[1]	1,228	[2]
Residential Portfolio Segment [Member] | Residential Nonguaranteed [Member]
Nonaccrual/NPLs	516	[1],[4]	775	[2],[5]
Residential Portfolio Segment [Member] | Home Equity
Nonaccrual/NPLs	225	[1]	341	[2]
Residential Portfolio Segment [Member] | Residential Construction
Nonaccrual/NPLs	84	[1]	112	[2]
Consumer Portfolio Segment [Member]
Nonaccrual/NPLs	12	[1]	25	[2]
Consumer Portfolio Segment [Member] | Consumer Other Direct
Nonaccrual/NPLs	4	[1]	6	[2]
Consumer Portfolio Segment [Member] | Consumer Indirect
Nonaccrual/NPLs	$ 8	[1]	$ 19	[2]

[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] 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 until the funds are received and the property is conveyed. The receivable amount related to proceeds due from the FHA or the VA totaled $177 million and $140 million at June 30, 2013 and December 31, 2012, respectively.

[4] 1Includes $339 million of loans carried at fair value, the majority of which were accruing current.

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