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Fair Value Measurements and Financial Instruments - Schedule of Fair Value Hedges (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Not Designated as Hedging Instrument | Foreign Currency Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative $ 3 $ 4
Activity related to derivatives not designated as hedging instruments [Abstract]    
Gain (loss) on instruments 0 5
Gain (loss) on hedged items 0 (5)
Fair Value Hedging    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 2,231 1,454
Activity related to fair value hedges [Abstract]    
Gain (loss) on derivatives (16) 0
Gain (loss) on hedged items 16 0
Fair Value Hedging | Foreign currency contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 1,231 204
Activity related to fair value hedges [Abstract]    
Gain (loss) on derivatives (7) 5
Gain (loss) on hedged items 7 (5)
Fair Value Hedging | Interest rate swap contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 1,000 1,250
Activity related to fair value hedges [Abstract]    
Gain (loss) on derivatives (9) (5)
Gain (loss) on hedged items 9 5
Cash Flow Hedging    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 702 650
Activity related to cash flow hedges [Abstract]    
Gain (loss) recognized in OCI (25) 11
Cash Flow Hedging | Foreign currency contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 702 643
Activity related to cash flow hedges [Abstract]    
Gain (loss) recognized in OCI (25) 12
Cash Flow Hedging | Commodity contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 0 7
Activity related to cash flow hedges [Abstract]    
Gain (loss) recognized in OCI 0 (1)
Net Investment Hedging    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 1,079 1,616
Activity related to net investment hedges [Abstract]    
Gain (loss) on instruments (183) 57
Gain (loss) on hedged items 183 (60)
Net Investment Hedging | Foreign currency contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 478 498
Activity related to net investment hedges [Abstract]    
Gain (loss) on instruments (71) 22
Gain (loss) on hedged items 71 (25)
Net Investment Hedging | Foreign Currency Debt    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of derivative 601 1,118
Activity related to net investment hedges [Abstract]    
Gain (loss) on instruments (112) 35
Gain (loss) on hedged items 112 (35)
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedging    
Activity related to cash flow hedges [Abstract]    
Gain (loss) reclassified into Cost of sales (3) 4
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedging | Foreign currency contracts    
Activity related to cash flow hedges [Abstract]    
Gain (loss) reclassified into Cost of sales (3) 4
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedging | Commodity contracts    
Activity related to cash flow hedges [Abstract]    
Gain (loss) reclassified into Cost of sales $ 0 $ 0