Financial Instruments Effect of Derivative Instruments (Details) - USD ($) $ in Millions		4 Months Ended	8 Months Ended	12 Months Ended
		Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain on Derivative Instruments, Net, Pretax		$ 91	$ (408)	$ (62)	$ 105
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Pre-Tax	[1]	3	5	23	(24)
(Loss) Gain on Hedging Activity	[2]	0	21	(13)	6
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, (Loss) Gain, Net		91	(429)	(49)	99
Commodity Contract [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Pre-Tax	[1]	3	5	23	(24)
Commodity Contract [Member] | Cost of Goods Sold | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain on Hedging Activity	[2],[3]	0	21	(13)	6
Commodity Contract [Member] | Cost of Goods Sold | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, (Loss) Gain, Net	[3]	0	2	9	5
Foreign Exchange Contract [Member] | Other Income (Expense) - net | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, (Loss) Gain, Net	[4]	$ 91	$ (431)	$ (58)	$ 94

[1] OCI is defined as other comprehensive income (loss).

[2] For cash flow hedges, this represents the portion of the gain (loss) reclassified from accumulated OCI into income during the period.

[3] Recorded in cost of goods sold.

[4] Gain recognized in other income (expense) - net was partially offset by the related gain on the foreign currency-denominated monetary assets and liabilities of the company's operations. See Note 9 - Supplementary Information, for additional information.