Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net earnings (loss)	$ 849	$ 906	$ 285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	174	(11)	(188)
Gain (loss) on cash flow hedges	(1)	5	2
Pension and postretirement benefits	9	(4)	3
Total other comprehensive income (loss), net of tax	181	(10)	(183)
Total comprehensive income (loss), net of tax	1,030	896	102
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	19
Comprehensive income (loss) attributable to Celanese Corporation	$ 1,024	$ 890	$ 121