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Receivables, Net - Rollforward of Allowance for Doubtful Accounts (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance For Doubtful Accounts Receivable Rollforward      
Beginning balance $ 19 $ 22 $ 15
Additions charged to costs and expenses 27 4 9
Charge-offs and other (8) (7) (2)
Ending balance $ 38 $ 19 $ 22