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			150,368
Stock option exercises, net of tax			0		3
Purchases of treasury stock, shares			(1,870,297)
Purchases of treasury stock, including related fees			0
Stock awards, shares			20,650
Stock awards			0
Purchases of treasury stock, shares	1,870,297			1,870,297
Purchases of treasury stock, including related fees	(103)			(103)
Stock-based compensation, net of tax					17
Net earnings (Loss) attributable to Celanese Corporation	455					455
Series A common stock dividends						(67)
Other comprehensive income (loss), net of tax	(49)						(49)
Net earnings (loss) attributable to noncontrolling interests	(2)							(2)
Contribution from noncontrolling interests								148
Balance as of the end of the period at Jun. 30, 2014	3,101		0	(464)	73	3,399	(53)	146
Total Celanese Corporation stockholders' equity at Jun. 30, 2014	$ 2,955	$ 2,955
Balance as of the end of the period, shares at Jun. 30, 2014			155,240,549	10,798,434