Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net earnings (loss)	$ 605	$ 607	$ 377
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	0	(1)
Foreign currency translation	5	(27)	37
Unrealized gain (loss) on interest rate swaps	7	27	17
Pension and postretirement benefits	(244)	(180)	(63)
Total other comprehensive income (loss), net of tax	(232)	(180)	(10)
Comprehensive income (loss)
Net earnings (loss)	605	607	377
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	0	(1)
Foreign currency translation	5	(27)	37
Unrealized gain (loss) on interest rate swaps	7	27	17
Pension and postretirement benefits	(244)	(180)	(63)
Total other comprehensive income (loss), net of tax	(232)	(180)	(10)
Total comprehensive income (loss), net of tax	373	427	367
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	$ 373	$ 427	$ 367