Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Condensed Consolidated Statements of Comprehensive Income
Net (loss) income		$ (47)	$ (140)	$ 5	$ (190)
Net income attributable to noncontrolling interest		(1)
Other comprehensive income items:
Reclassification to income of realized losses on pension and postretirement	[1]		3	3	6
Total other comprehensive income, net of tax			3	3	6
Comprehensive (loss) income attributable to common stock		(48)	(137)	8	(184)
Pension and postretirement income, associated tax		$ 0	$ 0	$ 0	$ 0

[1] No associated tax for the three and six months ended June 30, 2017 and 2016. See Note 10, Retirement and Postretirement Benefit Plans, for additional information.