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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 12,781	$ 12,733
Net Income	(6)	0
Reclassification Adjustments	(6)	(13)
Ending balance	13,785	12,615
Accum. Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(320)	(351)
Ending balance	(332)	(364)
Pensions and other postretirement liabilities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(292)	(319)
Net Income	(7)	0
Reclassification Adjustments	(6)	(13)
Ending balance	(305)	(332)
Other comprehensive income (loss) of equity investees
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(28)	(32)
Net Income	1	0
Reclassification Adjustments	0	0
Ending balance	$ (27)	$ (32)

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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