Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income before allocation to redeemable and non-redeemable noncontrolling interests	$ 51.4	$ 34.8	$ 50.2	$ 184.7
Net income attributable to redeemable and non-redeemable noncontrolling interests	0.1	0.2	0.0	0.5
Net income attributable to OUTFRONT Media Inc.	51.3	34.6	50.2	184.2
Other comprehensive income (loss), net of tax:
Cumulative translation adjustments	0.0	0.0	0.0	(4.0)
Net actuarial gain	(0.1)	0.0	(0.1)	0.0
Write-off of currency translation losses related to a disposition	0.0	0.0	0.0	9.5
Total other comprehensive income (loss), net of tax	(0.1)	0.0	(0.1)	5.5
Total comprehensive income	$ 51.2	$ 34.6	$ 50.1	$ 189.7