Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income (loss)	$ 77	$ 508	$ 229	$ 555
Other comprehensive income (loss), net of income taxes	1	1	2	(1)
Comprehensive income (loss)	78	509	231	554
Comprehensive (income) loss attributable to noncontrolling interest	(2)	3	(2)	2
Comprehensive income (loss) attributable to company shareholders	$ 76	$ 512	$ 229	$ 556