Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (143)	$ (283)	$ (745)	$ (413)
Net Loss Including Noncontrolling Interests	(144)	(283)	(746)	(413)
Other Items of Comprehensive Loss
Net Change in Mutual Fund Investment	0	0	0	(11)
Less Tax Expense	0	0	0	3
Net Change in Pension and Other	1	69	2	94
Less Tax Benefit	(1)	(23)	(1)	(33)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	46	1	53
Comprehensive Loss Including Noncontrolling Interests	(143)	(237)	(744)	(360)
Comprehensive Loss Including Noncontrolling Interests	(144)	(237)	(745)	(360)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	$ 1	$ 0	$ 1	$ 0