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Organization and Basis of Presentation - Additional Information (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2019
USD ($)
GeographicMarket
Country
Jan. 01, 2019
USD ($)
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 $ 75  
Lease liabilites $ 75  
ASC Topic 842    
Basis Of Presentation And Organization [Line Items]    
Right-of-use assets net   $ 66
Deferred rent   1
Lease liabilites   $ 67