Earnings (Loss) Per Share (Schedule of Earnings (Loss) Per Share) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	$ 1,101	$ 376	$ 426
Earnings (loss) from discontinued operations	0	(4)	1
Net earnings (loss)	$ 1,101	$ 372	$ 427
Weighted average shares - basic	158,801,150	158,359,914	156,226,526
Dilutive stock options	227,624	848,439	1,930,072
Dilutive RSUs	305,445	622,433	813,685
Weighted average shares - diluted	159,334,219	159,830,786	158,970,283