Consolidated Statements of Comprehensive (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Operating Revenue	$ 387	$ 474	$ 793	$ 930
Operating Expenses
Selling	82	112	178	227
Cost of service (exclusive of depreciation and amortization)	124	146	265	296
General and administrative	36	50	73	73
Depreciation and amortization	103	161	209	322
Total Operating Expenses	345	469	725	918
Operating Income	42	5	68	12
Interest expense, net	87	90	172	180
(Loss) Before Gain on Early Extinguishment of Debt and Provision (Benefit) for Income Taxes	(45)	(85)	(104)	(168)
Gain on early extinguishment of debt	1	0	1	0
(Loss) Before Provision (Benefit) for Income Taxes	(44)	(85)	(103)	(168)
Provision (benefit) for income taxes	(2)	0	(2)	(1)
Net (Loss)	(42)	(85)	(101)	(167)
Other Comprehensive (Loss)
Adjustments for pension and other post-employment benefits, net of taxes	(1)	2	2	4
Comprehensive (Loss)	$ (43)	$ (83)	$ (99)	$ (163)
Basic and diluted (loss) per common share ($ per share)	$ (2.39)	$ (4.93)	$ (5.78)	$ (9.67)
Basic and diluted weighted-average common shares outstanding (in shares)	17.4	17.3	17.4	17.3