Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 31, 2025	Dec. 31, 2024	Dec. 31, 2025
Intangible Asset, Acquired, Indefinite-Lived [Line Items]
Intangible assets with indefinite lives, Gross Carrying Amount		$ 680	$ 555
Intangible assets with indefinite lives, Accumulated Amortization / Impairment Charges / Divestitures		(131)	(116)
Intangible assets with indefinite lives, Net Carrying Amount		549	439
Intangible assets with indefinite-lives impairment loss	$ 0
Finite-Lived Intangible Assets [Line Items]
Intangible assets with finite lives, Gross Carrying Amount		1,089	964
Intangible assets with finite lives, Accumulated Amortization / Impairment Charges / Divestitures		(284)	(301)
Intangible assets with finite lives, Net Carrying Amount		805	663
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets with finite lives, Gross Carrying Amount		350	350
Intangible assets with finite lives, Accumulated Amortization / Impairment Charges / Divestitures		(108)	(138)
Intangible assets with finite lives, Net Carrying Amount		242	212
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets with finite lives, Gross Carrying Amount		30	30
Intangible assets with finite lives, Accumulated Amortization / Impairment Charges / Divestitures		(25)	(23)
Intangible assets with finite lives, Net Carrying Amount		5	7
Trademarks and patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets with finite lives, Gross Carrying Amount		29	29
Intangible assets with finite lives, Accumulated Amortization / Impairment Charges / Divestitures		(20)	(24)
Intangible assets with finite lives, Net Carrying Amount		9	$ 5
Cooper Tire
Intangible Asset, Acquired, Indefinite-Lived [Line Items]
Intangible assets with indefinite-lives impairment loss		$ 125