Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales	$ 9,673	$ 8,537	$ 5,655
Cost of sales	(7,293)	(5,855)	(4,362)
Gross profit	2,380	2,682	1,293
Selling, general and administrative expenses	(824)	(633)	(482)
Amortization of intangible assets	(62)	(25)	(22)
Research and development expenses	(112)	(86)	(74)
Other (charges) gains, net	(8)	3	(39)
Foreign exchange gain (loss), net	(1)	2	(5)
Gain (loss) on disposition of businesses and assets, net	5	3	(7)
Operating profit (loss)	1,378	1,946	664
Equity in net earnings (loss) of affiliates	220	146	134
Non-operating pension and other postretirement employee benefit (expense) income	17	106	17
Interest expense	(405)	(91)	(109)
Refinancing expense	0	(9)	0
Interest income	69	8	6
Dividend income - equity investments	133	147	126
Gain (loss) on sale of investments in affiliates	0	0	1,408
Other income (expense), net	9	(5)	5
Earnings (loss) from continuing operations before tax	1,421	2,248	2,251
Income tax (provision) benefit	489	(330)	(247)
Earnings (loss) from continuing operations	1,910	1,918	2,004
Earnings (loss) from operation of discontinued operations	(9)	(27)	(14)
Income tax (provision) benefit from discontinued operations	1	5	2
Earnings (loss) from discontinued operations	(8)	(22)	(12)
Net earnings (loss)	1,902	1,896	1,992
Net (earnings) loss attributable to noncontrolling interests	(8)	(6)	(7)
Net earnings (loss) attributable to Celanese Corporation	1,894	1,890	1,985
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	1,902	1,912	1,997
Earnings (loss) from discontinued operations	(8)	(22)	(12)
Net earnings (loss) attributable to Celanese Corporation	$ 1,894	$ 1,890	$ 1,985
Earnings (loss) per common share - basic
Continuing operations	$ 17.55	$ 17.19	$ 16.95
Discontinued operations	(0.07)	(0.20)	(0.10)
Net earnings (loss) - basic	17.48	16.99	16.85
Earnings (loss) per common share - diluted
Continuing operations	17.41	17.06	16.85
Discontinued operations	(0.07)	(0.20)	(0.10)
Net earnings (loss) - diluted	$ 17.34	$ 16.86	$ 16.75
Weighted average shares - basic	108,380,082	111,224,017	117,817,445
Weighted average shares - diluted	109,235,376	112,084,412	118,481,376