Revenue Recognition - Disaggregation of net sales (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Net sales		$ 2,611	$ 2,853
Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		1,378	1,630
Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales	[1]	1,233	1,223
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[2]	(28)	(27)
Intersegment Eliminations | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		28	27
North America | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		372	479
North America | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		388	365
Europe and Africa | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		456	560
Europe and Africa | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		423	460
Asia-Pacific | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		516	548
Asia-Pacific | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		394	367
South America | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales		34	43
South America | Acetyl Chain
Disaggregation of Revenue [Line Items]
Net sales		$ 28	$ 31

[1] Excludes intersegment sales of $28 million and $27 million for the three months ended March 31, 2024 and 2023, respectively.

[2] Includes intersegment sales primarily related to the Acetyl Chain.