Consolidated Statement Equity (USD $) In Millions, except Share data	Total	Total Celanese Corporation Stockholders' Equity [Member]	Series A Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balance as of the beginning of the period at Dec. 31, 2013	$ 2,699		$ 0	$ (361)	$ 53	$ 3,011	$ (4)	$ 0
Balance as of the beginning of the period, shares at Dec. 31, 2013			156,939,828	8,928,137
Stock option exercises, shares			25,000
Stock option exercises, net of tax			0		0
Purchases of treasury stock, shares			(1,035,374)
Purchases of treasury stock, including related fees			0
Stock awards, shares			2,330
Stock awards			0
Purchases of treasury stock, shares	1,035,374			1,035,374
Purchases of treasury stock, including related fees	(53)			(53)
Stock-based compensation, net of tax					8
Net earnings (Loss) attributable to Celanese Corporation	196					196
Series A common stock dividends						(28)
Other comprehensive income (loss), net of tax	(10)						(10)
Net earnings (loss) attributable to noncontrolling interests	(1)							(1)
Contribution from noncontrolling interests								109
Balance as of the end of the period at Mar. 31, 2014	2,920		0	(414)	61	3,179	(14)	108
Total Celanese Corporation stockholders' equity at Mar. 31, 2014	$ 2,812	$ 2,812
Balance as of the end of the period, shares at Mar. 31, 2014			155,931,784	9,963,511