Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements Of Operations [Abstract]
Revenue	$ 1,424	$ 1,141	$ 4,163	$ 3,442
Operating expenses:
Network access expenses	159	108	475	321
Network related expenses	331	276	969	798
Selling, general and administrative expenses	344	257	1,005	788
Depreciation and amortization	325	261	1,001	816
Acquisition and integration costs	58	42	150	72
Total operating expenses	1,217	944	3,600	2,795
Operating income	207	197	563	647
Investment and other income, net	1	25	3	26
Interest expense	246	170	751	508
Income (loss) before income taxes	(38)	52	(185)	165
Income tax expense (benefit)	(24)	10	(92)	46
Net income (loss)	(14)	42	(93)	119
Less: Dividends on preferred stock	67		67
Net income (loss) attributable to Frontier common shareholders	$ (81)	$ 42	$ (160)	$ 119
Basic and diluted net income (loss) per share attributable to Frontier common shareholders (in dollars per share)	$ (0.07)	$ 0.04	$ (0.15)	$ 0.12
Total weighted average shares outstanding - basic	1,161,207	994,647	1,061,644	994,393
Total weighted average shares outstanding - diluted	1,161,207	997,855	1,061,644	997,744