Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net earnings (loss)	$ 142	$ 193	[1]
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	0
Foreign currency translation	(31)	26
Gain (loss) on interest rate swaps	1	1
Pension and postretirement benefits	0	(4)	[1]
Total other comprehensive income (loss), net of tax	(30)	23	[1]
Total comprehensive income (loss), net of tax	112	216	[1]
Comprehensive (income) loss attributable to noncontrolling interests	0	0
Comprehensive income (loss) attributable to Celanese Corporation	$ 112	$ 216	[1]

[1] As Adjusted (Note 1)