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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 250

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 1.N.Q3)

-URI http://asc.fasb.org/extlink&oid=26874127&loc=d3e30840-122693

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-Number Topic 1

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Description of Business and Basis of Presentation - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 segment markets	Mar. 31, 2014
Description of Business and Basis of Presentation [Line Items]
Number of Largest Markets in Which the Entity Operates, Domestic	25
Number of reportable segments	2us-gaap_NumberOfReportableSegments
Net Cash Used in Operating Activities
Description of Business and Basis of Presentation [Line Items]
Misclassification correction		$ 7.5
Net Cash Used in Investing Activities
Description of Business and Basis of Presentation [Line Items]
Misclassification correction		7.5
Billboard Revenue
Description of Business and Basis of Presentation [Line Items]
Reclassification adjustment		2.6
Transit and Other Revenue
Description of Business and Basis of Presentation [Line Items]
Reclassification adjustment		$ 2.6
Minimum
Description of Business and Basis of Presentation [Line Items]
Number of Markets in Which the Entity Operates	180