Revenue Recognition Disaggregated Revenue (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales		$ 10,940	$ 9,673	$ 8,537
Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales		(93)	(94)	(75)
Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		6,149	4,024	2,718
Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales	[1]	4,791	5,649	5,819
Acetyl Chain | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales		93	94	75
North America [Member] | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		1,780	1,197	774
North America [Member] | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		1,448	1,713	1,533
Europe and Africa | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		1,941	1,538	1,155
Europe and Africa | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		1,680	1,961	1,914
Asia Pacific [Member] | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		2,274	1,180	703
Asia Pacific [Member] | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		1,543	1,811	2,214
South America [Member] | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		154	109	86
South America [Member] | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		$ 120	$ 164	$ 158

[1] Excludes intersegment sales of $93 million, $94 million and $75 million for the years ended December 31, 2023, 2022 and 2021, respectively.