Unaudited Interim Consolidated Statement of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 2,853	$ 2,538
Cost of sales	(2,222)	(1,793)
Gross profit	631	745
Selling, general and administrative expenses	(285)	(174)
Amortization of intangible assets	(41)	(11)
Research and development expenses	(42)	(24)
Other (charges) gains, net	(23)	(1)
Foreign exchange gain (loss), net	6	(1)
Gain (loss) on disposition of businesses and assets, net	5	(3)
Operating profit (loss)	251	531
Equity in net earnings (loss) of affiliates	15	56
Non-operating pension and other postretirement employee benefit (expense) income	1	24
Interest expense	(182)	(35)
Interest income	8	1
Dividend income - equity investments	34	37
Other income (expense), net	(6)	2
Earnings (loss) from continuing operations before tax	121	616
Income tax (provision) benefit	(25)	(112)
Earnings (loss) from continuing operations	96	504
Earnings (loss) from operation of discontinued operations	(3)	0
Income tax (provision) benefit from discontinued operations	0	0
Earnings (loss) from discontinued operations	(3)	0
Net earnings (loss)	93	504
Net (earnings) loss attributable to noncontrolling interests	(2)	(2)
Net earnings (loss) attributable to Celanese Corporation	91	502
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	94	502
Earnings (loss) from discontinued operations	(3)	0
Net earnings (loss)	$ 91	$ 502
Earnings (loss) per common share - basic
Continuing operations - basic (in dollars per share)	$ 0.87	$ 4.64
Discontinued operations - basic (in dollars per share)	(0.03)	0
Net earnings (loss) - basic (in dollars per share)	0.84	4.64
Earnings (loss) per common share - diluted
Continuing operations - diluted (in dollars per share)	0.86	4.61
Discontinued operations - diluted (in dollars per share)	(0.03)	0
Net earnings (loss) - diluted (in dollars per share)	$ 0.83	$ 4.61
Weighted average shares - basic (in shares)	108,634,068	108,185,912
Weighted average shares - diluted (in shares)	109,188,266	108,917,577