Revenue Recognition - Disaggregation of net sales (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022
Revenue, Major Customer [Line Items]
Net sales		$ 2,795		$ 2,486		$ 5,648		$ 5,024
Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		1,585		948		3,215		1,858
Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales	[1]	1,210		1,538		2,433		3,166
Intersegment Eliminations
Revenue, Major Customer [Line Items]
Net sales		(23)	[2]	(21)	[2]	(50)	[3]	(45)	[3]
Intersegment Eliminations | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		23		21		50		45
North America | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		471		284		950		573
North America | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		361		451		726		876
Europe and Africa | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		519		380		1,079		757
Europe and Africa | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		437		545		897		1,137
Asia-Pacific | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		554		256		1,102		477
Asia-Pacific | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		379		510		746		1,071
South America | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		41		28		84		51
South America | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		$ 33		$ 32		$ 64		$ 82

[1] Excludes intersegment sales of $23 million and $21 million for the three months ended June 30, 2023 and 2022, respectively. Excludes intersegment sales of $50 million and $45 million for the six months ended June 30, 2023 and 2022, respectively.

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

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