Unaudited Interim Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (17)	$ 124
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss)	(5)	(54)
Gain (loss) on derivative hedges	35	2
Pension and postretirement benefits	1	(1)
Total other comprehensive income (loss), net of tax	31	(53)
Total comprehensive income (loss), net of tax	14	71
Comprehensive (income) loss attributable to noncontrolling interests	(4)	(3)
Comprehensive income (loss) attributable to Celanese Corporation	$ 10	$ 68