Stockholders' Equity Reclassifications out of AOCI (Details) - USD ($) $ in Millions		4 Months Ended	12 Months Ended
		Dec. 31, 2017	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)			$ 524	$ (81)	$ (46)
Income (loss) from continuing operations after income taxes			1,822	756	(270)
Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	[1]		9	(6)	(1)
Income (loss) from continuing operations after income taxes			(4)	12	12
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[2]		(13)	18	13
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(4)	12	12
Gain (Loss) on Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[3]	$ 0	7	0
Reclassification from AOCI, Current Period, Tax	[1]	$ 0	0	0
AOCI Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(602)	18	16
Pension Plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			41	5	5
Pension Plan | Prior Service Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[3],[4]		(2)	(1)	(1)
Pension Plan | Actuarial Losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[3],[4],[5]		55	4	2
Pension Plan | Accumulated Defined Benefit Plans Adjustment, Settlement Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[3],[4],[5]		1	3	4
Pension Plan | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			54	6	5
Reclassification from AOCI, Current Period, Tax	[1]		(13)	(1)	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			41	5	5
Other Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(646)	1	(1)
Other Benefit Plans | Prior Service Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[3],[4]		(922)	0	0
Other Benefit Plans | Actuarial Losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[3],[4]		81	1	(1)
Other Benefit Plans | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			(842)	1	(1)
Reclassification from AOCI, Current Period, Tax	[1]		196	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			$ (646)	$ 1	$ (1)

[1] Reflected in provision for (benefit from) income taxes from continuing operations in the Consolidated Statements of Operations.

[2] Reflected in cost of goods sold in the Consolidated Statements of Operations.

[3] Reflected in other income - net in the Consolidated Statements of Operations.

[4] These accumulated other comprehensive (loss) income components are included in the computation of net periodic benefit (credit) cost of the company's pension and other benefit plans. See Note 20 - Pension Plans and Other Post Employment Benefits, to the Consolidated Financial Statements, for additional information.

[5] A portion reflected in (loss) income from discontinued operations after income taxes for the year ended December 31, 2019.