Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Operations [Abstract]
Revenue	$ 5,576	$ 4,772	$ 4,762
Operating expenses:
Network access expenses	640	465	431
Network related expenses	1,287	1,118	1,084
Selling, general and administrative expenses	1,348	1,088	1,057
Depreciation and amortization	1,320	1,139	1,170
Pension settlement costs			44
Acquisition and integration costs	236	142	10
Total operating expenses	4,831	3,952	3,796
Gain on sale of Mohave partnership interest			15
Operating income	745	820	981
Investment and other income, net	7	39	9
Losses on early extinguishment of debt			160
Interest expense	1,113	696	667
Income (loss) before income taxes	(361)	163	163
Income tax expense (benefit)	(165)	30	48
Net income (loss)	(196)	133	115
Less: Dividends on preferred stock	120
Less: Income attributable to the noncontrolling interest in a partnership			2
Net income (loss) attributable to Frontier common shareholders	$ (316)	$ 133	$ 113
Basic and diluted net income (loss) per share attributable to Frontier common shareholders (in dollars per share)	$ (0.29)	$ 0.13	$ 0.11
Total weighted average shares outstanding - basic	1,084,606	994,418	992,659
Total weighted average shares outstanding - diluted	1,084,606	998,162	993,997