Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Items of Comprehensive Income (Loss)
Net Income (Loss)	$ (985)	$ (2,441)	$ 1,214
Net Change in Mutual Fund Investment	0	(11)	0
Less Tax Expense	0	4	0
Net Change in Pension and Other	3	99	42
Less Tax (Benefit) Expense	(1)	(35)	(15)
Other Comprehensive Income (Loss)	2	57	27
Comprehensive (Loss) Income Including Noncontrolling Interests	(983)	(2,384)	1,241
Less: Comprehensive Income Attributable to Noncontrolling Interests	13	0	0
Comprehensive (Loss) Income Including Noncontrolling Interests	$ (996)	$ (2,384)	$ 1,241