Unaudited Interim Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 120	$ 949	$ 397	$ 1,263
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss)	49	7	(12)	(181)
Gain (loss) on derivative hedges	16	(17)	30	(13)
Pension and postretirement benefits	0	(1)	(1)	(1)
Total other comprehensive income (loss), net of tax	65	(11)	17	(195)
Total comprehensive income (loss), net of tax	185	938	414	1,068
Comprehensive (income) loss attributable to noncontrolling interests	(8)	2	(8)	(1)
Comprehensive income (loss) attributable to Celanese Corporation	$ 177	$ 940	$ 406	$ 1,067