Nonperforming Assets (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Nonaccrual/NPLs	$ 2,649	[1]	$ 2,903	[2]
OREO	411	[3]	479	[3]
Other repossessed assets	14		10
Loans Held-for-sale, Other	60
Total nonperforming assets	3,134		3,392
Commercial Portfolio Segment
Nonaccrual/NPLs	815	[1]	926	[2]
Commercial Portfolio Segment | Commercial and Industrial
Nonaccrual/NPLs	337	[1]	348	[2]
Commercial Portfolio Segment | Commercial Real Estate
Nonaccrual/NPLs	280	[1]	288	[2]
Commercial Portfolio Segment | Commercial Construction
Nonaccrual/NPLs	198	[1]	290	[2]
Residential Mortgage Loans
Nonaccrual/NPLs	1,812	[1]	1,950	[2]
Residential Mortgage Loans | Residential Nonguaranteed
Nonaccrual/NPLs	1,291	[1],[4]	1,392	[2],[5]
Residential Mortgage Loans | Home Equity
Nonaccrual/NPLs	317	[1]	338	[2]
Residential Mortgage Loans | Residential Construction
Nonaccrual/NPLs	204	[1]	220	[2]
Consumer Portfolio Segment
Nonaccrual/NPLs	22	[1]	27	[2]
Consumer Portfolio Segment | Consumer Other Direct
Nonaccrual/NPLs	6	[1]	7	[2]
Consumer Portfolio Segment | Consumer Indirect
Nonaccrual/NPLs	$ 16	[1]	$ 20	[2]

[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] 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 $152 million and $132 million at March 31, 2012 and December 31, 2011, respectively.

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

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