Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net earnings (loss)	$ 167	$ 145	$ 512	$ 319
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	5	0	6
Foreign currency translation	(69)	98	18	39
Unrealized gain (loss) on interest rate swaps	5	(2)	14	1
Pension and postretirement benefits	4	2	12	8
Total other comprehensive income (loss), net of tax	(60)	103	44	54
Comprehensive income (loss)
Net earnings (loss)	167	145	512	319
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	5	0	6
Foreign currency translation	(69)	98	18	39
Unrealized gain (loss) on interest rate swaps	5	(2)	14	1
Pension and postretirement benefits	4	2	12	8
Total other comprehensive income (loss), net of tax	(60)	103	44	54
Total comprehensive income (loss), net of tax	107	248	556	373
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	$ 107	$ 248	$ 556	$ 373