Unaudited Interim Consolidated Statement of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net sales	$ 2,611	$ 2,853
Cost of sales	(2,057)	(2,222)
Gross profit	554	631
Selling, general and administrative expenses	(265)	(285)
Amortization of intangible assets	(41)	(41)
Research and development expenses	(34)	(42)
Other (charges) gains, net	(14)	(23)
Foreign exchange gain (loss), net	11	6
Gain (loss) on disposition of businesses and assets, net	(1)	5
Operating profit (loss)	210	251
Equity in net earnings (loss) of affiliates	55	15
Non-operating pension and other postretirement employee benefit (expense) income	2	1
Interest expense	(169)	(182)
Interest income	13	8
Dividend income - equity investments	34	34
Other income (expense), net	12	(6)
Earnings (loss) from continuing operations before tax	157	121
Income tax (provision) benefit	(33)	(25)
Earnings (loss) from continuing operations	124	96
Earnings (loss) from operation of discontinued operations	0	(3)
Income tax (provision) benefit from discontinued operations	0	0
Earnings (loss) from discontinued operations	0	(3)
Net earnings (loss)	124	93
Net (earnings) loss attributable to noncontrolling interests	(3)	(2)
Net earnings (loss) attributable to Celanese Corporation	121	91
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	121	94
Earnings (loss) from discontinued operations	0	(3)
Net earnings (loss)	$ 121	$ 91
Earnings (loss) per common share - basic
Continuing operations - basic (in dollars per share)	$ 1.11	$ 0.87
Discontinued operations - basic (in dollars per share)	0	(0.03)
Net earnings (loss) - basic (in dollars per share)	1.11	0.84
Earnings (loss) per common share - diluted
Continuing operations - diluted (in dollars per share)	1.10	0.86
Discontinued operations - diluted (in dollars per share)	0	(0.03)
Net earnings (loss) - diluted (in dollars per share)	$ 1.10	$ 0.83
Weighted average shares - basic (in shares)	109,069,060	108,634,068
Weighted average shares - diluted (in shares)	109,513,991	109,188,266