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Property and Equipment - Summary of Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Land [Member]
Dec. 31, 2013
Land [Member]
Sep. 30, 2014
Building and Improvements [Member]
Dec. 31, 2013
Building and Improvements [Member]
Sep. 30, 2014
Building and Improvements [Member]
Minimum
Sep. 30, 2014
Building and Improvements [Member]
Maximum
Sep. 30, 2014
Advertising Structures [Member]
Dec. 31, 2013
Advertising Structures [Member]
Sep. 30, 2014
Advertising Structures [Member]
Minimum
Sep. 30, 2014
Advertising Structures [Member]
Maximum
Sep. 30, 2014
Furniture, Equipment and Other [Member]
Dec. 31, 2013
Furniture, Equipment and Other [Member]
Sep. 30, 2014
Furniture, Equipment and Other [Member]
Minimum
Sep. 30, 2014
Furniture, Equipment and Other [Member]
Maximum
Sep. 30, 2014
Construction in progress [Member]
Dec. 31, 2013
Construction in progress [Member]
Property and Equipment [Line Items]                                    
Property and Equipment $ 1,890.1 $ 1,892.0 $ 88.4 $ 88.6 $ 47.5 $ 45.0     $ 1,662.4 $ 1,662.3     $ 76.1 $ 77.2     $ 15.7 $ 18.9
Less: accumulated depreciation 1,185.7 1,136.6                                
Property and equipment, net $ 704.4 $ 755.4                                
Property, Plant and Equipment, Useful Life             20 years 40 years     5 years 20 years     3 years 10 years