Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2021	Dec. 31, 2022
Income Taxes [Line Items]
Tax effect		$ 1,567	$ 95	$ 10
Income (loss) before income taxes		(133)	130	(721)
Net discrete tax expense (benefit)		1,453	(2)	(9)
Total net deferred tax assets		243	1,578
Valuation allowance		2,734	1,252
Deferred tax assets, operating loss, capital loss, and tax credit carryforwards		1,083
Unrecognized tax benefits		107	98	92		$ 87
Unrecognized tax benefits that would impact effective tax rate		78
Unrecognized tax benefits interest on income taxes accrued		1
Unsettled unrecognized tax benefits that would require cash		22
Goodyear net income (loss)		(1,721)	46	(729)
Deferred tax assets		3,209	3,077		$ 315
Amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries		100
Income tax cash payments, net		160	170	$ 200
Internal Revenue Service (IRS) | Settlement with Taxing Authority
Income Taxes [Line Items]
Goodyear net income (loss)					$ 1,500
Domestic Tax Jurisdiction
Income Taxes [Line Items]
Total net deferred tax assets		1,400	1,300
Valuation allowance		1,428
Operating loss carryforward		228
State and Local Authority
Income Taxes [Line Items]
Valuation allowance			26
Foreigns Country
Income Taxes [Line Items]
Total net deferred tax assets		1,500	1,500
Valuation allowance		1,306	1,300
United States
Income Taxes [Line Items]
Non-cash expense	$ 1,400
Luxembourg | Foreigns Country
Income Taxes [Line Items]
Valuation allowance		1,100	$ 1,100
Europe
Income Taxes [Line Items]
Deferred tax assets, operating loss, capital loss, and tax credit carryforwards, subject to expiration		$ 84