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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 14,306	$ 12,781
Net Income	1	0
Reclassification Adjustments	0	(2)
Ending balance	14,511	12,536
Accum. Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(262)	(320)
Ending balance	(261)	(322)
Pensions and other postretirement liabilities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(240)	(292)
Net Income	0	0
Reclassification Adjustments	0	(2)
Ending balance	(240)	(294)
Other comprehensive income loss of equity investees
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(22)	(28)
Net Income	1	0
Reclassification Adjustments	0	0
Ending balance	$ (21)	$ (28)

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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