Income Taxes (Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal	$ (1)	$ (1)	$ (2)
State	10	19	(9)
Foreign	2	(1)	(1)
Total current	11	17	(12)
Federal	(21)	0	1
State	1	(1)	4
Foreign	(67)	6	9
Total deferred	(87)	5	14
Total income tax expense (benefit)	$ (76)	$ 22	$ 2