Acquisitions (Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Acquisitions [Abstract]
Revenue	$ 5,775	$ 6,011
Operating income	985	1,049
Net income attributable to Frontier common shareholders	$ 191	$ 83
Basic and diluted net income per share attributable to Frontier common shareholders	$ 0.19	$ 0.08

Business Acquisition, Pro Forma Earnings Per Share, Basic and diluted

No definition available.

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- Definition

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

+ Details

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

+ Details

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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- References

No definition available.

+ Details

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