Consolidated Statements of Comprehensive Income (Loss) - Equity Component [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net earnings (loss)	$ 201	$ 258	$ 435	$ 453
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	(1)	0
Foreign currency translation	37	(22)	(119)	(17)
Gain (loss) on cash flow hedges	1	(3)	3	(6)
Pension and postretirement benefits	4	(14)	1	(26)
Total other comprehensive income (loss), net of tax	41	(39)	(116)	(49)
Total comprehensive income (loss), net of tax	242	219	319	404
Comprehensive (income) loss attributable to noncontrolling interests	4	1	6	2
Comprehensive income (loss) attributable to Celanese Corporation	$ 246	$ 220	$ 325	$ 406