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Property and Equipment, Net - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Property and Equipment [Line Items]    
Property and equipment $ 2,330.9 $ 2,300.6
Less: Accumulated depreciation 1,678.8 1,652.7
Property and equipment, net 652.1 647.9
Land    
Property and Equipment [Line Items]    
Property and equipment 103.3 102.9
Buildings    
Property and Equipment [Line Items]    
Property and equipment $ 50.6 $ 50.3
Buildings | Minimum    
Property and Equipment [Line Items]    
Property and equipment, useful life 15 years 15 years
Buildings | Maximum    
Property and Equipment [Line Items]    
Property and equipment, useful life 35 years 35 years
Advertising structures    
Property and Equipment [Line Items]    
Property and equipment $ 1,953.6 $ 1,937.4
Advertising structures | Minimum    
Property and Equipment [Line Items]    
Property and equipment, useful life 3 years 3 years
Advertising structures | Maximum    
Property and Equipment [Line Items]    
Property and equipment, useful life 20 years 20 years
Furniture, equipment and other    
Property and Equipment [Line Items]    
Property and equipment $ 175.6 $ 171.3
Furniture, equipment and other | Minimum    
Property and Equipment [Line Items]    
Property and equipment, useful life 3 years 3 years
Furniture, equipment and other | Maximum    
Property and Equipment [Line Items]    
Property and equipment, useful life 10 years 10 years
Construction in progress    
Property and Equipment [Line Items]    
Property and equipment $ 47.8 $ 38.7