STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	$ 286	$ 1,503	$ (1,273)
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and postretirement benefit plan, net of tax	0	7	7
Currency translation adjustment	0	109	0
Other comprehensive income, net of tax	0	116	7
COMPREHENSIVE INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	286	1,619	(1,266)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	40	1,420	(1,398)
Noncontrolling Interest, Egypt
OTHER COMPREHENSIVE INCOME (LOSS):
Comprehensive income attributable to noncontrolling interest	245	199	132
Noncontrolling Interest, Altus
OTHER COMPREHENSIVE INCOME (LOSS):
Comprehensive income attributable to noncontrolling interest	$ 1	$ 0	$ 0