Nonperforming Assets (Additional Information) (Detail) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Other Real Estate	[1]	$ 49	$ 56
Proceeds due from FHA or VA [Member]
Other Real Estate		$ 52	$ 52	[2]

[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 property is conveyed and the funds are received. The receivable related to proceeds due from the FHA or the VA totaled $52 million at both June 30, 2016 and December 31, 2015.

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