Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Operating Revenue	$ 1,815	$ 1,444	$ 1,278
Operating Expenses
Selling	436	383	280
Cost of service (exclusive of depreciation and amortization)	576	479	358
General and administrative	164	209	118
Depreciation and amortization	643	765	419
Impairment charge	0	458	0
Total Operating Expenses	1,819	2,294	1,175
Operating Income (Loss)	(4)	(850)	103
Interest expense, net	356	316	196
(Loss) Before Reorganization Items, Gains on Early Extinguishment of Debt and Provision (Benefit) for Income Taxes	(360)	(1,166)	(93)
Reorganization items	0	38	0
Gains on early extinguishment of debt	2	9	140
Income (Loss) Before Provision (Benefit) for Income Taxes	(358)	(1,195)	47
Provision (benefit) for income taxes	13	(376)	6
Net Income (Loss)	(371)	(819)	41
Other Comprehensive Income (Loss)
Adjustments for pension and other post-employment benefits, net of taxes	(51)	10	(16)
Comprehensive Income (Loss)	$ (422)	$ (809)	$ 25
Basic and diluted earnings (loss) per common share (in dollars per share)	$ (21.43)	$ (54.89)	$ 4.09
Basic and diluted weighted average common shares outstanding (in shares)	17.3	14.9	10.1