STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	$ 1,503	$ (1,273)	$ (10,667)
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and postretirement benefit plan, net of tax	7	7	(3)
Currency translation adjustment	109	0	0
Other comprehensive income (loss), net of tax	116	7	(3)
COMPREHENSIVE INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	1,619	(1,266)	(10,670)
Comprehensive income (loss) attributable to noncontrolling interest	199	132	(315)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ 1,420	$ (1,398)	$ (10,355)