Fair Value Measurements and Financial Instruments - Schedule of Notional Values (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	$ 986	$ 788
Fair Value Hedges | Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	586	388
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	400
Fair Value Hedges | Forward-starting interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	0	0
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	1,113	781
Cash Flow Hedges | Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	797	761
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 | Forward-starting interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	300	0
Cash Flow Hedges | Commodity Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	16	20
Net Investment Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	4,072	4,334
Net Investment Hedges | Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	585	478
Net Investment Hedges | Foreign Currency Debt
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	3,487	3,856
Net Investment Hedges | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional values	0	0
Net Investment Hedges | Forward-starting 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