Income Taxes - Tax Effects of Temporary Differences and Carryforwards of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Valuation Allowance [Line Items]
Loss and tax credit carryforwards	$ 218	$ 275
Other assets	246	245
Research and development capitalization	428	362
Asset impairments and restructuring reserves	32	43
Postretirement medical and life benefits	90	103
Other accrued liabilities	375	319
Other employee benefits	291	344
Gross deferred tax assets	1,680	1,691
Valuation allowances	(173)	(207)	$ (166)	$ (138)
Total deferred tax assets	1,507	1,484
Intangible and other assets	(110)	(117)
Fixed assets	(212)	(223)
Finance leases	(192)	(209)
Total deferred tax liabilities	(514)	(549)
Net deferred tax assets	993	$ 935
Maximum | Luxembourg Inland Revenue
Valuation Allowance [Line Items]
Deferred tax assets	$ 2,900