Unaudited Interim Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net earnings (loss)	$ 345	$ 233	$ 710	$ 417
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0	1	0	1
Foreign currency translation	(66)	78	(17)	106
Gain (loss) on cash flow hedges	6	1	5	(1)
Pension and postretirement benefits	0	0	1	5
Total other comprehensive income (loss), net of tax	(60)	80	(11)	111
Total comprehensive income (loss), net of tax	285	313	699	528
Comprehensive (income) loss attributable to noncontrolling interests	(1)	(2)	(3)	(3)
Comprehensive income (loss) attributable to Celanese Corporation	$ 284	$ 311	$ 696	$ 525