Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements Of Operations [Abstract]
Revenue	$ 8,896	$ 5,576	$ 4,772
Operating expenses:
Network access expenses	1,470	640	465
Network related expenses	1,887	1,287	1,118
Selling, general and administrative expenses	2,093	1,346	1,086
Depreciation and amortization	2,031	1,320	1,139
Acquisition and integration costs	436	236	142
Restructuring costs and other charges	91	2	2
Total operating expenses	8,008	4,831	3,952
Operating income	888	745	820
Investment and other income, net	20	7	39
Interest expense	1,531	1,113	696
Income (loss) before income taxes	(623)	(361)	163
Income tax expense (benefit)	(250)	(165)	30
Net income (loss)	(373)	(196)	133
Less: Dividends on preferred stock	214	120
Net income (loss) attributable to Frontier common shareholders	$ (587)	$ (316)	$ 133
Basic and diluted net income (loss) per share attributable to Frontier common shareholders (in dollars per share)	$ (0.51)	$ (0.29)	$ 0.13
Total weighted average shares outstanding - basic	1,164,099	1,084,606	994,418
Total weighted average shares outstanding - diluted	1,164,099	1,084,606	998,162