Segment Information (Schedule of Business Segments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023		Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales		$ 10,280	$ 10,940		$ 9,673
Cost of sales		(7,924)	(8,337)		(7,293)
Gross Profit		2,356	2,603		2,380
Selling, General and Administrative Expense		(1,030)	(1,075)		(824)
Amortization of Intangible Assets		(159)	(164)		(62)
Research and Development Expense		(130)	(146)		(112)
Other (charges) gains, net		(1,744)	(68)		(8)
Gain (loss) on disposition of businesses and assets, net		(14)	505		5
Other segment items(2)	[1]	24	32		(1)
Operating profit (loss)		(697)	1,687		1,378
Depreciation and amortization		801	706		462
Equity in net earnings (loss) of affiliates		196	102		220
Capital expenditures	[2]	414	542		583
Goodwill and intangible assets, net		9,028	10,952
Total assets		22,857	26,597
Increase (decrease) in accrued capital expenditures		(21)	(26)		40
Engineered Materials
Segment Reporting Information [Line Items]
Net sales		5,607	6,149		4,024
Equity in net earnings (loss) of affiliates	[3]	182	88		209
Acetyl Chain
Segment Reporting Information [Line Items]
Net sales	[4]	4,673	4,791		5,649
Other Activities
Segment Reporting Information [Line Items]
Equity in net earnings (loss) of affiliates		14	14		11
Operating Segments [Member] | Engineered Materials
Segment Reporting Information [Line Items]
Net sales		5,607	6,149		4,024
Cost of sales		(4,371)	(4,825)		(3,249)
Gross Profit		1,236	1,324		775
Selling, General and Administrative Expense		(434)	(435)		(213)
Amortization of Intangible Assets		(157)	(162)		(57)
Research and Development Expense		(90)	(97)		(71)
Other (charges) gains, net		(1,724)	(56)		(7)
Gain (loss) on disposition of businesses and assets, net		(10)	509	[5]	2
Other segment items(2)	[1]	0	0		0
Operating profit (loss)		(1,179)	1,083		429
Depreciation and amortization		510	462		226
Equity in net earnings (loss) of affiliates		172	83		202
Capital expenditures		211	237		178
Goodwill and intangible assets, net		8,617	10,525
Total assets		15,496	17,930
Operating Segments [Member] | Acetyl Chain
Segment Reporting Information [Line Items]
Net sales	[6]	4,763	4,884		5,743
Cost of sales		(3,647)	(3,607)		(4,130)
Gross Profit		1,116	1,277		1,613
Selling, General and Administrative Expense		(119)	(118)		(125)
Amortization of Intangible Assets		(2)	(2)		(3)
Research and Development Expense		(40)	(40)		(40)
Other (charges) gains, net		0	(4)		0
Gain (loss) on disposition of businesses and assets, net		(4)	(4)		2
Other segment items(2)	[1]	0	0		0
Operating profit (loss)		951	1,109		1,447
Depreciation and amortization		244	217		213
Equity in net earnings (loss) of affiliates		10	6		7
Capital expenditures		151	207		352
Goodwill and intangible assets, net		411	427
Total assets		5,265	5,538
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Other Activities
Segment Reporting Information [Line Items]
Net sales		0	0		0
Cost of sales		4	2		(8)
Gross Profit		4	2		(8)
Selling, General and Administrative Expense		(477)	(522)		(486)
Amortization of Intangible Assets		0	0		(2)
Research and Development Expense		0	(9)		(1)
Other (charges) gains, net		(20)	(8)		(1)
Gain (loss) on disposition of businesses and assets, net		0	0		1
Other segment items(2)	[1]	24	32		(1)
Operating profit (loss)		(469)	(505)		(498)
Depreciation and amortization		47	27		23
Equity in net earnings (loss) of affiliates		14	13		11
Capital expenditures		52	98		53
Goodwill and intangible assets, net		0	0
Total assets		2,096	3,129
Intersegment [Member]
Segment Reporting Information [Line Items]
Net sales		(90)	(93)		(94)
Cost of sales		90	93		94
Gross Profit		0			0
Selling, General and Administrative Expense		0	0		0
Amortization of Intangible Assets		0	0		0
Research and Development Expense		0	0		0
Other (charges) gains, net		0	0		0
Gain (loss) on disposition of businesses and assets, net		0	0		0
Other segment items(2)	[1]	0	0		0
Operating profit (loss)		0	0		0
Depreciation and amortization		0	0		0
Equity in net earnings (loss) of affiliates		0	0		0
Capital expenditures		0	0		0
Goodwill and intangible assets, net		0	0
Total assets		0	0
Intersegment [Member] | Acetyl Chain
Segment Reporting Information [Line Items]
Net sales		$ 90	$ 93		$ 94

[1] Includes Foreign exchange gain (loss), net.

[2] Includes a decrease in accrued capital expenditures of $21 million, a decrease in accrued capital expenditures of $26 million and an increase in accrued capital expenditures of $40 million for the years ended December 31, 2024, 2023 and 2022, respectively.

[3] Engineered Materials includes an equity method investment with losses in excess of its carrying amount due to the Company's guarantee of various debt obligations under agreements with third parties related to an equity affiliate (Note 19). This equity method investment was recorded in Current Other liabilities (Note 10) as of December 31, 2024 and 2023.

[4] Excludes intersegment sales of $90 million, $93 million and $94 million for the years ended December 31, 2024, 2023 and 2022, respectively.

[5] Includes a $515 million gain related to the formation of the Nutrinova joint venture included in Gain (loss) on disposition of businesses and assets, net in the consolidated statements of operations (Note 4).

[6] Includes intersegment sales of $90 million, $93 million and $94 million for the years ended December 31, 2024, 2023 and 2022, respectively.