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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Postretirement benefits other than pensions	$ 1,024	$ 1,119
Pension and other employee benefit plans	1,421	1,522
Warranties, dealer and customer allowances, claims and discounts	4,215	3,684
Miscellaneous	4,302	5,121
Total deferred tax assets before valuation allowances	32,894	33,562
Less: valuation allowances	(6,529)	(6,979)
Total deferred tax assets	26,365	26,583
Deferred tax liabilities
Property, plant and equipment	5,111	4,233
Intangible assets	635	699
Total deferred tax liabilities	5,746	4,932
Net deferred tax assets	20,619	21,651
Domestic Tax Jurisdiction
Deferred tax liabilities
Operating loss carryforwards	411
Operating loss carryforwards, not subject to expiration	129
Tax credit carryforwards	6,200
Tax credit carryforwards indefinitely	462
Domestic Tax Jurisdiction | Tax Year 2042
Deferred tax liabilities
Operating loss carryforwards, subject to expiration	282
Domestic Tax Jurisdiction | Tax Year 2044
Deferred tax liabilities
Tax credit carryforwards, subject to expiration	5,700
Foreign Tax Jurisdiction
Deferred tax liabilities
Operating loss carryforwards	5,200
Operating loss carryforwards, not subject to expiration	4,800
Tax credit carryforwards	68
Tax credit carryforwards indefinitely	45
Foreign Tax Jurisdiction | Tax Year 2043
Deferred tax liabilities
Tax credit carryforwards, subject to expiration	23
Foreign Tax Jurisdiction | Tax Year 2044
Deferred tax liabilities
Operating loss carryforwards, subject to expiration	342
U.S.
Deferred tax assets
U.S. capitalized research expenditures	10,111	9,879
Operating loss and tax credit carryforwards	6,582	6,033
Non-U.S.
Deferred tax assets
Operating loss and tax credit carryforwards	5,239	6,204
Germany, Spain, South Korea, United States and Brazil
Deferred tax assets
Less: valuation allowances	$ (6,500)	$ (7,000)

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