Revenue Recognition - Disaggregation of net sales (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2022		Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021
Revenue, Major Customer [Line Items]
Net sales		$ 2,301		$ 2,266		$ 7,325		$ 6,262
Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		929		684		2,787		2,011
Acetate Tow
Revenue, Major Customer [Line Items]
Net sales		135		128		379		385
Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales	[1]	1,237		1,454		4,159		3,866
Intersegment Eliminations
Revenue, Major Customer [Line Items]
Net sales		(37)	[2]	(35)	[2]	(109)	[3]	(88)	[3]
Intersegment Eliminations | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		37		35		109		88
North America | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		292		194		865		546
North America | Acetate Tow
Revenue, Major Customer [Line Items]
Net sales		24		24		75		77
North America | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		437		405		1,262		1,046
Europe and Africa | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		355		282		1,112		882
Europe and Africa | Acetate Tow
Revenue, Major Customer [Line Items]
Net sales		65		64		181		204
Europe and Africa | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		396		458		1,417		1,188
Asia-Pacific | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		256		185		733		518
Asia-Pacific | Acetate Tow
Revenue, Major Customer [Line Items]
Net sales		44		39		118		99
Asia-Pacific | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		357		540		1,354		1,530
South America | Engineered Materials
Revenue, Major Customer [Line Items]
Net sales		26		23		77		65
South America | Acetate Tow
Revenue, Major Customer [Line Items]
Net sales		2		1		5		5
South America | Acetyl Chain
Revenue, Major Customer [Line Items]
Net sales		$ 47		$ 51		$ 126		$ 102

[1] Excludes intersegment sales of $37 million and $35 million for the three months ended September 30, 2022 and 2021, respectively. Excludes intersegment sales of $109 million and $88 million for the nine months ended September 30, 2022 and 2021, respectively.

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

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