Goodwill and Intangible Assets, Net (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Indefinite-lived Intangible Assets [Line Items]
Impairment losses				$ (1,140)	$ (1,517)	$ 0
Renewals				0
Trademarks and Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment loss (Note 2)				346	117	$ 0
Engineered Materials
Indefinite-lived Intangible Assets [Line Items]
Impairment losses	$ (1,100)	$ (1,500)	$ (1,000)	(1,140)	$ (1,517)
Goodwill, Impairment Loss, Discount Rate, Increase (Decrease)	2.75%		2.75%
Engineered Materials | Trademarks and Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment loss (Note 2)				$ 346
Engineered Materials | Micromax
Indefinite-lived Intangible Assets [Line Items]
Impairment losses	$ (98)