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Financial Instruments - Summary of Derivative Instruments Gain (Losses) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Summary of Derivative Instruments Gains (Losses) [Abstract]        
Net losses recorded in AOCL expected to be reclassified to net income in the future     $ (1,000,000)  
Foreign Currency Transaction Gain (Loss), before Tax $ 1,000,000 $ (1,000,000) 3,000,000 $ (3,000,000)
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]        
Summary of Derivative Instruments Gains (Losses) [Abstract]        
Derivative loss recognized in OCI (effective portion) (1,000,000) (3,000,000) 0 (3,000,000)
Cost of Sales [Member] | Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]        
Summary of Derivative Instruments Gains (Losses) [Abstract]        
Derivative loss reclassified from AOCI to income - Cost of outsourcing (effective portion) (1,000,000) (1,000,000) (2,000,000) (3,000,000)
Derivative loss reclassified from AOCI to income - Cost of outsourcing (effective portion)     0 0
Underlying, Derivative     0  
Foreign Currency Gain (Loss) [Member] | Foreign Exchange Forward [Member] | Derivatives Not Designated as Hedging Instruments [Member]        
Summary of Derivative Instruments Gains (Losses) [Abstract]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (1,000,000) $ (2,000,000) $ (1,000,000) $ (3,000,000)