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Financial Instruments - Summary of Derivative Instruments Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Net Derivative Liability $ (2) $ (3)
Other current assets [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Total Derivative Assets 2 0
Liabilities [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Total Derivative Liabilities (4) (3)
Derivatives Designated as Hedging Instruments [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Net Derivative Liability 1  
Derivatives Designated as Hedging Instruments [Member] | Liabilities [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Net Derivative Liability (1) (3)
Derivatives Designated as Hedging Instruments [Member] | Foreign exchange contracts - forwards [Member] | Other current assets [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Total Derivative Assets 1 0
Derivatives Designated as Hedging Instruments [Member] | Foreign exchange contracts - forwards [Member] | Other current liabilities [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Total Derivative Liabilities (2) (3)
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts - forwards [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Net Derivative Liability (1) 0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts - forwards [Member] | Other current assets [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Total Derivative Assets 1 0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts - forwards [Member] | Other current liabilities [Member]    
Summary Of Derivative Instruments By Hedge Designation [Abstract]    
Total Derivative Liabilities $ (2) $ 0