Financial Instruments Cash Flow Hedges Included in AOCI (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Remaining Maturity	2 years
Beginning Balance	$ 2	$ (26)
Additions and revaluations of derivatives designated as cash flow hedges	(22)	(4)
Clearance of hedge results to earnings	5	5
Ending Balance	(15)	(25)
After-tax net (loss) gain to be reclassified from AOCL into earnings over the next twelve months	(20)
Derivative, Notional Amount	$ 418	351		$ 570
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Remaining Maturity	2 years
Beginning Balance	$ 0
Additions and revaluations of derivatives designated as cash flow hedges	16
Ending Balance	16
After-tax net (loss) gain to be reclassified from AOCL into earnings over the next twelve months	16
Derivative, Notional Amount	$ 751	$ 0		$ 0
Net Investment Hedging [Member] | Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount | €			€ 450