Unaudited Interim Consolidated Statement of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales	$ 2,795	$ 2,486	$ 5,648	$ 5,024
Cost of sales	(2,109)	(1,781)	(4,331)	(3,574)
Gross profit	686	705	1,317	1,450
Selling, general and administrative expenses	(274)	(197)	(559)	(371)
Amortization of intangible assets	(42)	(11)	(83)	(22)
Research and development expenses	(40)	(26)	(82)	(50)
Other (charges) gains, net	(10)	1	(33)	0
Foreign exchange gain (loss), net	15	(1)	21	(2)
Gain (loss) on disposition of businesses and assets, net	0	12	5	9
Operating profit (loss)	335	483	586	1,014
Equity in net earnings (loss) of affiliates	23	60	38	116
Non-operating pension and other postretirement employee benefit (expense) income	(2)	25	(1)	49
Interest expense	(182)	(48)	(364)	(83)
Interest income	7	1	15	2
Dividend income - equity investments	31	36	65	73
Other income (expense), net	4	(3)	(2)	(1)
Earnings (loss) from continuing operations before tax	216	554	337	1,170
Income tax (provision) benefit	4	(112)	(21)	(224)
Earnings (loss) from continuing operations	220	442	316	946
Earnings (loss) from operation of discontinued operations	0	(8)	(3)	(8)
Income tax (provision) benefit from discontinued operations	1	2	1	2
Earnings (loss) from discontinued operations	1	(6)	(2)	(6)
Net earnings (loss)	221	436	314	940
Net (earnings) loss attributable to noncontrolling interests	(1)	(2)	(3)	(4)
Net earnings (loss) attributable to Celanese Corporation	220	434	311	936
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	219	440	313	942
Earnings (loss) from discontinued operations	1	(6)	(2)	(6)
Net earnings (loss)	$ 220	$ 434	$ 311	$ 936
Earnings (loss) per common share - basic
Continuing operations - basic (in dollars per share)	$ 2.01	$ 4.06	$ 2.88	$ 8.70
Discontinued operations - basic (in dollars per share)	0.01	(0.06)	(0.02)	(0.06)
Net earnings (loss) - basic (in dollars per share)	2.02	4.00	2.86	8.64
Earnings (loss) per common share - diluted
Continuing operations - diluted (in dollars per share)	2.00	4.03	2.86	8.63
Discontinued operations - diluted (in dollars per share)	0.01	(0.05)	(0.01)	(0.06)
Net earnings (loss) - diluted (in dollars per share)	$ 2.01	$ 3.98	$ 2.85	$ 8.57
Weighted average shares - basic (in shares)	108,886,678	108,392,155	108,761,071	108,289,603
Weighted average shares - diluted (in shares)	109,306,331	109,123,349	109,281,364	109,158,055