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Financial Instruments and Risk Management - Notional Amounts of Outstanding Derivative Instruments (Detail) - Designated as Hedging Instrument [Member]
Dec. 31, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Dec. 31, 2017
SGD
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Derivative [Line Items]          
Notional amount | $ $ 1,393,000,000     $ 1,370,000,000 $ 1,449,000,000
Foreign Exchange Forward Contracts [Member] | R&D and Other Operating Expense [Member]          
Derivative [Line Items]          
Notional amount   € 237,000,000      
Foreign Exchange Forward Contracts [Member] | Manufacturing Costs [Member]          
Derivative [Line Items]          
Notional amount   352,000,000 SGD 130,000,000    
Currency Collars [Member] | R&D and Other Operating Expense [Member]          
Derivative [Line Items]          
Notional amount   208,000,000      
Currency Collars [Member] | Manufacturing Costs [Member]          
Derivative [Line Items]          
Notional amount   € 284,000,000