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Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Allowance for Trade Receivables [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period $ 7 $ 8 $ 9
Charged to costs and expenses 3 2 1
Additions/ (Deductions) 2 (3) (2)
Balance at end of period 12 7 8
Valuation Allowance of Deferred Tax Assets [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 1,585 1,607 1,454
Translation adjustment (4) (28) (30)
Charged to costs and expenses 13 24 201
Additions/ (Deductions) (16) (18) (18)
Balance at end of period $ 1,578 $ 1,585 $ 1,607