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Fair Value Measurements and Financial Instruments - Schedule of Notional Values (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Fair Value Hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values $ 797 $ 1,227
Fair Value Hedges | Foreign Currency Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 397 327
Fair Value Hedges | Foreign Currency Debt    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 0 0
Fair Value Hedges | Interest Rate Swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 400 900
Fair Value Hedges | Commodity Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 0 0
Cash Flow Hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 729 796
Cash Flow Hedges | Foreign Currency Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 710 782
Cash Flow Hedges | Foreign Currency Debt    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 0 0
Cash Flow Hedges | Interest Rate Swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 0 0
Cash Flow Hedges | Commodity Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 19 14
Net Investment Hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 4,378 1,878
Net Investment Hedges | Foreign Currency Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 608 482
Net Investment Hedges | Foreign Currency Debt    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 3,770 1,396
Net Investment Hedges | Interest Rate Swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values 0 0
Net Investment Hedges | Commodity Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional values $ 0 $ 0