Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (283)	$ 419	$ (413)	$ 811
Other Items of Comprehensive Income
Net Change in Mutual Fund Investment	0	0	(11)	0
Less Tax Benefit	0	0	3	0
Net Change in Pension and Other	69	6	94	16
Less Tax Expense	(23)	(2)	(33)	(6)
Other Comprehensive Income	46	4	53	10
Comprehensive Income (Loss)	$ (237)	$ 423	$ (360)	$ 821