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Organization and Basis of Presentation - Additional Information (Detail)
$ in Millions
Nov. 22, 2013
GeographicMarket
Country
Mar. 31, 2019
USD ($)
Jan. 01, 2019
USD ($)
Basis Of Presentation And Organization [Line Items]      
Number of geographical area covered | GeographicMarket 80    
Number of countries distribution occur through vendors | Country 40    
Right-of-use assets net   $ 70  
Lease liabilites   $ 70  
ASC Topic 842      
Basis Of Presentation And Organization [Line Items]      
Right-of-use assets net     $ 66
Deferred rent     1
Lease liabilites     $ 67