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Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Millions
 4 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule of Other Related Party Transactions [Line Items]        
Warehousing, selling and administration expenses     $ 6 $ 9
Adjustment to income tax from spin-off   $ (3)    
Maximum [Member]        
Schedule of Other Related Party Transactions [Line Items]        
Other operating expenses $ 1