v3.3.1.900
Property and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Qualifying software costs $ 48 $ 45 $ 35
Depreciation and amortization expense $ 115 $ 117 $ 128
Capitalized Software [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 3 years