Nonperforming Assets (Additional Information) (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Other Real Estate	[1]	$ 56	$ 99
Proceeds due from FHA or VA [Member]
Other Real Estate	[2]	$ 52	$ 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 property is conveyed and the funds are received. The receivable related to proceeds due from the FHA or the VA totaled $52 million and $57 million at December 31, 2015 and 2014, respectively.

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