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Fair Value Measurements and Financial Instruments - Schedule of Gain (Loss) Included in OCI (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Cash flow hedges [Abstract]        
Gain (loss) recognized in OCI $ 6   $ 3  
Gain (loss) recognized in OCI   $ (1)   $ 7
Foreign Currency Contracts        
Cash flow hedges [Abstract]        
Gain (loss) recognized in OCI 7   2  
Gain (loss) recognized in OCI   (2)   4
Net investment hedges [Abstract]        
Gain (loss) on instruments 23   22  
Gain (loss) on instruments   1   26
Gain (loss) on hedged items (23)   (22)  
Gain (loss) on hedged items   0   (23)
Commodity Contracts        
Cash flow hedges [Abstract]        
Gain (loss) recognized in OCI (1)   1  
Gain (loss) recognized in OCI   0   0
Foreign Currency Debt        
Net investment hedges [Abstract]        
Gain (loss) on instruments 100   105  
Gain (loss) on instruments   10   69
Gain (loss) on hedged items $ (100)   $ (105)  
Gain (loss) on hedged items   $ (10)   $ (69)