Consolidated Statement Equity - 6 months ended Jun. 30, 2015 - USD ($) $ in Millions	Total		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, shares at Dec. 31, 2014			152,902,710	13,266,625
Balance as of the beginning of the period at Dec. 31, 2014	$ 3,078
Total Celanese Corporation stockholders' equity at Dec. 31, 2014	2,818		$ 0	$ (611)	$ 103	$ 3,491	$ (165)
Stockholders' Equity Attributable to Noncontrolling Interest at Dec. 31, 2014	$ 260							$ 260
Stock option exercises, shares			70,117
Stock option exercises, net of tax			$ 0		2
Purchases of treasury stock, shares			(9,264)
Purchases of treasury stock, including related fees			$ 0
Stock awards, shares			379,668
Stock awards			$ 0
Purchases of treasury stock, shares	0	[1]		9,264
Purchases of treasury stock, including related fees	$ 0			$ 0
Stock-based compensation, net of tax					15
Net earnings (loss) attributable to Celanese Corporation	441					441
Series A common stock dividends						(84)
Other comprehensive income (loss), net of tax	(116)						(116)
Net earnings (loss) attributable to noncontrolling interests	(6)							(6)
Contributions from noncontrolling interests								155
Balance as of the end of the period, shares at Jun. 30, 2015			153,343,231	13,275,889
Balance as of the end of the period at Jun. 30, 2015	3,485
Stockholders' Equity Attributable to Noncontrolling Interest at Jun. 30, 2015	409							$ 409
Total Celanese Corporation stockholders' equity at Jun. 30, 2015	$ 3,076		$ 0	$ (611)	$ 120	$ 3,848	$ (281)

[1] Excludes 9,264 shares withheld from an executive officer to cover statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock. Restricted stock awards are considered outstanding at the time of issuance. Accordingly, the shares withheld are treated as treasury shares.