Earnings (Loss) Per Share (Schedule of Earnings (Loss) Per Share) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations		$ 1,902	$ 1,912	$ 1,997
Earnings (loss) from discontinued operations		(8)	(22)	(12)
Net earnings (loss) attributable to Celanese Corporation		$ 1,894	$ 1,890	$ 1,985
Weighted average shares - basic		108,380,082	111,224,017	117,817,445
Incremental shares attributable to equity awards	[1]	855,294	860,395	663,931
Weighted average shares - diluted		109,235,376	112,084,412	118,481,376
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		154,172	555	4,313

[1] Excludes 154,172, 555 and 4,313 equity award shares for the years ended December 31, 2022, 2021 and 2020, respectively, as their effect would have been antidilutive.