Unaudited Interim Consolidated Statement of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Net sales	$ 2,651	$ 2,795	$ 5,262	$ 5,648
Cost of sales	(2,010)	(2,109)	(4,067)	(4,331)
Gross profit	641	686	1,195	1,317
Selling, general and administrative expenses	(255)	(274)	(520)	(559)
Amortization of intangible assets	(38)	(42)	(79)	(83)
Research and development expenses	(33)	(40)	(67)	(82)
Other (charges) gains, net	(48)	(10)	(62)	(33)
Foreign exchange gain (loss), net	(9)	15	2	21
Gain (loss) on disposition of businesses and assets, net	(8)	0	(9)	5
Operating profit (loss)	250	335	460	586
Equity in net earnings (loss) of affiliates	51	23	106	38
Non-operating pension and other postretirement employee benefit (expense) income	2	(2)	4	(1)
Interest expense	(174)	(182)	(343)	(364)
Interest income	10	7	23	15
Dividend income - equity investments	31	31	65	65
Other income (expense), net	13	4	25	(2)
Earnings (loss) from continuing operations before tax	183	216	340	337
Income tax (provision) benefit	(29)	4	(62)	(21)
Earnings (loss) from continuing operations	154	220	278	316
Earnings (loss) from operation of discontinued operations	(1)	0	(1)	(3)
Income tax (provision) benefit from discontinued operations	0	1	0	1
Earnings (loss) from discontinued operations	(1)	1	(1)	(2)
Net earnings (loss)	153	221	277	314
Net (earnings) loss attributable to noncontrolling interests	2	(1)	(1)	(3)
Net earnings (loss) attributable to Celanese Corporation	155	220	276	311
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	156	219	277	313
Earnings (loss) from discontinued operations	(1)	1	(1)	(2)
Net earnings (loss)	$ 155	$ 220	$ 276	$ 311
Earnings (loss) per common share - basic
Continuing operations - basic (in dollars per share)	$ 1.43	$ 2.01	$ 2.54	$ 2.88
Discontinued operations - basic (in dollars per share)	(0.01)	0.01	(0.01)	(0.02)
Net earnings (loss) - basic (in dollars per share)	1.42	2.02	2.53	2.86
Earnings (loss) per common share - diluted
Continuing operations - diluted (in dollars per share)	1.42	2.00	2.53	2.86
Discontinued operations - diluted (in dollars per share)	(0.01)	0.01	(0.01)	(0.01)
Net earnings (loss) - diluted (in dollars per share)	$ 1.41	$ 2.01	$ 2.52	$ 2.85
Weighted average shares - basic (in shares)	109,314,411	108,886,678	109,191,736	108,761,071
Weighted average shares - diluted (in shares)	109,547,401	109,306,331	109,523,364	109,281,364