Goodwill and Intangible Assets, Net - Schedule of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2026 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 4,171	[1]
Transfer	2	[2]
Exchange rate changes	(23)
Ending balance	4,150	[1]
Engineered Materials
Goodwill [Roll Forward]
Beginning balance	3,782	[1]
Transfer	2	[2]
Exchange rate changes	(16)
Ending balance	3,768	[1]
Goodwill, Impaired, Accumulated Impairment Loss	(2,700)
Acetyl Chain
Goodwill [Roll Forward]
Beginning balance	389	[1]
Transfer	0	[2]
Exchange rate changes	(7)
Ending balance	$ 382	[1]

[1] Includes accumulated impairment losses of $2.7 billion in the Engineered Materials segment.

[2] Related to the sale of the Micromax® business (Note 3).