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Intangible Assets
3 Months Ended
Mar. 31, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Intangible Assets Intangible Assets
Our identifiable intangible assets primarily consist of acquired permits and leasehold agreements, and franchise agreements, which grant us the right to operate out-of-home structures in specified locations and the right to provide advertising space on railroad and municipal transit properties. Identifiable intangible assets are amortized on a straight-line basis over their estimated useful life, which is the respective life of the agreement that in some cases includes historical experience of renewals.

Our identifiable intangible assets consist of the following:
(in millions)GrossAccumulated AmortizationImpairmentNet
As of March 31, 2026:
Permits and leasehold agreements$1,545.1 $(996.7)$— $548.4 
Franchise agreements(a)
866.6 (330.8)(485.8)50.0 
Other intangible assets18.1 (12.9)— 5.2 
Total intangible assets$2,429.8 $(1,340.4)$(485.8)$603.6 
As of December 31, 2025:
Permits and leasehold agreements$1,538.1 $(983.8)$— $554.3 
Franchise agreements(a)
909.0 (371.7)(485.8)51.5 
Other intangible assets18.2 (12.0)— 6.2 
Total intangible assets$2,465.3 $(1,367.5)$(485.8)$612.0 
(a)We reclassified all Prepaid MTA equipment deployment costs and recorded impairments in the first and second quarters of 2024, due to the long-term outlook of our Transit reporting unit.

In the three months ended March 31, 2026, we acquired 6 displays, resulting in amortizable intangible assets for permits and leasehold agreements of $7.7 million, which are amortized using the straight-line method over their estimated useful lives, an average period of 18.4 years.
All of our intangible assets, except goodwill, are subject to amortization. Amortization expense was $17.2 million in the three months ended March 31, 2026, and $17.1 million in the three months ended March 31, 2025.