Derivative and Other Financial Instruments - Notional Values of Outstanding Derivative Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Foreign exchange | Derivatives not designated as hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivative	$ 865	$ 796
Foreign exchange | Derivatives in cash flow hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivative	568	820
Foreign exchange | Derivatives in fair value hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivative	154	74
Commodities | Derivatives in cash flow hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivative	413	428
Interest Rate Swap [Member] | Derivatives in cash flow hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivative	$ 200	$ 0