Consolidated Statements of Shareholders' Equity (USD $) In Millions, except Share data	Preferred stock	Series A common stock	Treasury stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss), net	Total Celanese Corporation shareholders' equity	Noncontrolling interests	Total
Balance as of the beginning of the period at Dec. 31, 2010	$ 0	$ 0	$ (829)	$ 574	$ 1,851	$ (670)		$ 0	$ 926
Balance as of the beginning of the period, shares at Dec. 31, 2010	0	155,759,293	22,269,278
Issuance of preferred stock, shares	0
Issuance of preferred stock	0
Stock-based compensation, net of tax				10
Stock option exercises, shares		706,330
Stock option exercises, net of tax		0		17
Purchases of treasury stock, shares		(273,753)	273,753						273,753
Purchases of treasury stock, including related fees		0	(13)						(13)
Stock awards, shares		151,260
Stock awards		0
Net earnings (loss) attributable to Celanese Corporation					345				345
Series A common stock dividends					(16)
Preferred stock dividends									0
Other comprehensive income (loss)						104			104
Net earnings (loss) attributable to noncontrolling interests								0	0
Balance as of the end of the period at Jun. 30, 2011	0	0	(842)	601	2,180	(566)		0	1,373
Total Celanese Corporation shareholders' equity at Jun. 30, 2011							$ 1,373		$ 1,373
Balance as of the end of the period, shares at Jun. 30, 2011	0	156,343,130	22,543,031