Goodwill and Intangible Assets, Net - Schedule of Goodwill (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Dec. 31, 2024
Goodwill [Line Items]
As of December 31, 2024	[1]	$ 5,387
Exchange rate changes		26
As of March 31, 2025(1)	[1]	5,413
Goodwill, impaired, accumulated impairment loss		1,500	$ 1,500
Engineered Materials [Member]
Goodwill [Line Items]
As of December 31, 2024	[1]	5,025
Exchange rate changes		17
As of March 31, 2025(1)	[1]	5,042
Acetyl Chain [Member]
Goodwill [Line Items]
As of December 31, 2024	[1]	362
Exchange rate changes		9
As of March 31, 2025(1)	[1]	$ 371

[1] (1)Includes accumulated impairment losses of $1.5 billion in the Engineered Materials segment as of March 31, 2025 and December 31, 2024.