Financial Instruments Cash Flow Hedges Included in AOCI (Details) € in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 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	$ 73	$ (16)	$ (16)	$ 2
Additions and revaluations of derivatives designated as cash flow hedges	(10)	10	93	(34)
Clearance of hedge results to earnings	(4)	(2)	(18)	24
Ending Balance	59	(8)	59	(8)
After-tax net gain (loss) to be reclassified from AOCL into earnings over the next twelve months			(50)
Derivative, Notional Amount	262	51	$ 262	51		$ 383
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Remaining Maturity			2 years
Beginning Balance	(21)	19	$ (17)	0
Additions and revaluations of derivatives designated as cash flow hedges	8	4	3	23
Clearance of hedge results to earnings	9	(17)	10	(17)
Ending Balance	(4)	6	(4)	6
After-tax net gain (loss) to be reclassified from AOCL into earnings over the next twelve months			11
Derivative, Notional Amount	$ 1,227	$ 770	$ 1,227	$ 770		$ 1,164
Net Investment Hedging [Member] | Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount | €					€ 450