Nonperforming Assets (Additional Information) (Detail) - Class of Financing Receivable [Domain] - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Other Real Estate	[1]	$ 72	$ 99
Proceeds due from FHA or VA [Member]
Other Real Estate	[2]	$ 55	$ 57

[1] 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 $55 million and $57 million at June 30, 2015 and December 31, 2014, respectively.

[2] Nonaccruing restructured loans are included in total nonaccrual/NPLs.