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Commitment and Contingencies - Narrative (Details)					3 Months Ended	6 Months Ended	12 Months Ended	36 Months Ended		60 Months Ended	80 Months Ended
Commitment and Contingencies - Narrative (Details)	May 26, 2026 USD ($)	Feb. 17, 2026 USD ($)	Jul. 29, 2021 Displays	Jul. 28, 2021	Jun. 30, 2026 USD ($) Displays	Jun. 30, 2026 USD ($) Displays	Dec. 31, 2026 USD ($)	Feb. 16, 2029 USD ($) numberOfPayments	Feb. 16, 2029	Dec. 31, 2026	Apr. 01, 2028 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2020 USD ($)
Other Commitments [Line Items]
Recoupment					$ 0	$ 0
Gross					2,440,300,000	2,440,300,000						$ 2,465,300,000
Franchise agreements
Other Commitments [Line Items]
Gross					869,600,000	869,600,000						$ 909,000,000.0
Standalone letters of credit and sublimit to revolving credit facility
Other Commitments [Line Items]
Letters of credit outstanding, amount					72,500,000	72,500,000
Surety Bond
Other Commitments [Line Items]
Surety bonds outstanding					125,500,000	125,500,000
AdQuick Agreement [Member]
Other Commitments [Line Items]
Investment, Acquisition Date		Feb. 17, 2026
Investment Owned, Cost		$ 20,000,000.0
Payments to Acquire Investments	$ 4,000,000.0	$ 4,000,000.0
AdQuick Agreement [Member] \| Subsequent event
Other Commitments [Line Items]
Software License Contract Term									3 years
License fee							$ 17,000,000.0
Payments to Acquire Investments								$ 4,000,000.0
Number Of Payments To Acquire Investments \| numberOfPayments								4
MTA Agreement
Other Commitments [Line Items]
Contract term			13 years	10 years
Contract term extension option			5 years
MTA Agreement \| Subsequent event
Other Commitments [Line Items]
Revenue share percentage										65.00%
Additional equipment deployment cost percentage											2.50%
MTA equipment deployment costs \| Franchise agreements
Other Commitments [Line Items]
Intangible asset related to franchise agreements additions						4,200,000
Gross					$ 28,600,000	$ 28,600,000
Maximum \| MTA Agreement \| Subsequent event
Other Commitments [Line Items]
Decrease in revenue percentage											5.00%
Maximum \| Metropolitan Transportation Authority ("MTA")
Other Commitments [Line Items]
MTA equipment deployment costs													$ 50,700,000
Minimum \| Subsequent event
Other Commitments [Line Items]
Recoupment											$ 0
MTA digital advertising screens on subway and train platforms
Other Commitments [Line Items]
Number of displays \| Displays			5,433		5,021	5,021
MTA smaller-format digital advertising screens rolling stock
Other Commitments [Line Items]
Number of displays \| Displays			15,896		15,904	15,904
MTA communication displays
Other Commitments [Line Items]
Number of displays \| Displays			9,283		6,429	6,429
MTA displays installed
Other Commitments [Line Items]
Number of displays \| Displays					27,354	27,354
Number of display additions \| Displays					0	0