Financial Instruments Cash Flow Hedges Included in AOCI (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 EUR (€)	Dec. 31, 2020 USD ($)
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Remaining Maturity	2 years
Beginning Balance	$ (16)	$ 2
Additions and revaluations of derivatives designated as cash flow hedges	30	(22)
Clearance of hedge results to earnings	(4)	5
Ending Balance	10	(15)
After-tax net gain (loss) to be reclassified from AOCL into earnings over the next twelve months	(8)
Derivative, Notional Amount	$ 239	418		$ 383
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Remaining Maturity	2 years
Beginning Balance	$ (17)	0
Additions and revaluations of derivatives designated as cash flow hedges	25	16
Clearance of hedge results to earnings	(2)	0
Ending Balance	6	16
After-tax net gain (loss) to be reclassified from AOCL into earnings over the next twelve months	6
Derivative, Notional Amount	$ 1,030	$ 751		$ 1,164
Net Investment Hedging [Member] | Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount | €			€ 450