Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 10,940	$ 9,673	$ 8,537
Cost of sales	(8,337)	(7,293)	(5,855)
Gross profit	2,603	2,380	2,682
Selling, general and administrative expenses	(1,075)	(824)	(633)
Amortization of intangible assets	(164)	(62)	(25)
Research and development expenses	(146)	(112)	(86)
Other (charges) gains, net	(68)	(8)	3
Foreign exchange gain (loss), net	32	(1)	2
Gain (loss) on disposition of businesses and assets, net	505	5	3
Operating profit (loss)	1,687	1,378	1,946
Equity in net earnings (loss) of affiliates	102	220	146
Non-operating pension and other postretirement employee benefit (expense) income	(69)	17	106
Interest expense	(720)	(405)	(91)
Accelerated amortization due to refinancing activity	(7)	0	(9)
Interest income	39	69	8
Dividend income - equity investments	126	133	147
Other income (expense), net	25	9	(5)
Earnings (loss) from continuing operations before tax	1,183	1,421	2,248
Income tax (provision) benefit	790	489	(330)
Earnings (loss) from continuing operations	1,973	1,910	1,918
Earnings (loss) from operation of discontinued operations	(12)	(9)	(27)
Income tax (provision) benefit from discontinued operations	3	1	5
Earnings (loss) from discontinued operations	(9)	(8)	(22)
Net earnings (loss)	1,964	1,902	1,896
Net (earnings) loss attributable to noncontrolling interests	(4)	(8)	(6)
Net earnings (loss) attributable to Celanese Corporation	1,960	1,894	1,890
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	1,969	1,902	1,912
Earnings (loss) from discontinued operations	(9)	(8)	(22)
Net earnings (loss) attributable to Celanese Corporation	$ 1,960	$ 1,894	$ 1,890
Earnings (loss) per common share - basic
Continuing operations	$ 18.09	$ 17.55	$ 17.19
Discontinued operations	(0.08)	(0.07)	(0.20)
Net earnings (loss) - basic	18.01	17.48	16.99
Earnings (loss) per common share - diluted
Continuing operations	18.00	17.41	17.06
Discontinued operations	(0.08)	(0.07)	(0.20)
Net earnings (loss) - diluted	$ 17.92	$ 17.34	$ 16.86
Weighted average shares - basic	108,848,962	108,380,082	111,224,017
Weighted average shares - diluted	109,379,664	109,235,376	112,084,412