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Inventories, Net - Summary of Inventories (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]              
Finished goods       $ 737 $ 988   $ 881
Less: inventory reserves $ (44) $ (39) $ (31) (44) (39) $ (39) (31)
Total       $ 693 $ 949   $ 850
Inventory reserves:              
Inventory reserves, Beginning balance 39 31 32        
Inventory reserves, Additions charged to costs and expenses 54 8 5        
Inventory reserves, Charge-offs and other (49)   (6)        
Inventory reserves, Ending balance $ 44 $ 39 $ 31