Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
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 expenses	(1,030)	(1,075)	(824)
Amortization of intangible assets	(159)	(164)	(62)
Research and development expenses	(130)	(146)	(112)
Other (charges) gains, net	(1,744)	(68)	(8)
Foreign exchange gain (loss), net	24	32	(1)
Gain (loss) on disposition of businesses and assets, net	(14)	505	5
Operating profit (loss)	(697)	1,687	1,378
Equity in net earnings (loss) of affiliates	196	102	220
Non-operating pension and other postretirement employee benefit (expense) income	(20)	(69)	17
Interest expense	(676)	(720)	(405)
Refinancing expense	0	(7)	0
Interest income	33	39	69
Dividend income - equity investments	128	126	133
Other income (expense), net	40	25	9
Earnings (loss) from continuing operations before tax	(996)	1,183	1,421
Income tax (provision) benefit	(510)	790	489
Earnings (loss) from continuing operations	(1,506)	1,973	1,910
Earnings (loss) from operation of discontinued operations	(10)	(12)	(9)
Income tax (provision) benefit from discontinued operations	2	3	1
Earnings (loss) from discontinued operations	(8)	(9)	(8)
Net earnings (loss)	(1,514)	1,964	1,902
Net (earnings) loss attributable to noncontrolling interests	(8)	(4)	(8)
Net earnings (loss) attributable to Celanese Corporation	(1,522)	1,960	1,894
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	(1,514)	1,969	1,902
Earnings (loss) from discontinued operations	(8)	(9)	(8)
Net earnings (loss) attributable to Celanese Corporation	$ (1,522)	$ 1,960	$ 1,894
Earnings (loss) per common share - basic
Continuing operations - basic (in dollars per share)	$ (13.86)	$ 18.09	$ 17.55
Discontinued operations - basic (in dollars per share)	(0.07)	(0.08)	(0.07)
Net earnings (loss) - basic (in dollars per share)	(13.93)	18.01	17.48
Earnings (loss) per common share - diluted
Continuing operations - diluted (in dollars per share)	(13.86)	18.00	17.41
Discontinued operations - diluted (in dollars per share)	(0.07)	(0.08)	(0.07)
Net earnings (loss) - diluted (in dollars per share)	$ (13.93)	$ 17.92	$ 17.34
Weighted average shares - basic (in shares)	109,273,779	108,848,962	108,380,082
Weighted average shares - diluted (in shares)	109,273,779	109,379,664	109,235,376