Property and Equipment, Net - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Property and Equipment [Line Items]
Property and equipment	$ 2,137.5	$ 2,126.6
Less: Accumulated depreciation	1,493.2	1,482.8
Property and equipment, net	644.3	643.8
Land
Property and Equipment [Line Items]
Property and equipment	110.4	110.4
Buildings
Property and Equipment [Line Items]
Property and equipment	$ 49.4	$ 49.0
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	$ 1,750.4	$ 1,743.4
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	$ 198.9	$ 194.2
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	$ 28.4	$ 29.6