Property and Equipment, Net - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Property and Equipment [Line Items]
Property and equipment	$ 2,151.8	$ 2,129.8
Less: Accumulated depreciation	1,509.3	1,480.9
Property and equipment, net	642.5	648.9
Land
Property and Equipment [Line Items]
Property and equipment	110.4	110.2
Buildings
Property and Equipment [Line Items]
Property and equipment	$ 48.2	$ 47.1
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	$ 1,763.1	$ 1,752.8
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	$ 196.0	$ 186.8
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	$ 34.1	$ 32.9