v3.26.1
Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Intangible Asset, Finite-Lived [Line Items]    
Gross $ 2,440.3 $ 2,465.3
Accumulated amortization (1,356.0) (1,367.5)
Impairment (485.8) (485.8)
Intangible assets 598.5 612.0
Permits and leasehold agreements    
Intangible Asset, Finite-Lived [Line Items]    
Gross 1,552.6 1,538.1
Accumulated amortization (1,009.0) (983.8)
Intangible assets 543.6 554.3
Franchise agreements    
Intangible Asset, Finite-Lived [Line Items]    
Gross 869.6 909.0
Accumulated amortization (333.3) (371.7)
Impairment (485.8) (485.8)
Intangible assets [1] 50.5 51.5
Other intangible assets    
Intangible Asset, Finite-Lived [Line Items]    
Gross 18.1 18.2
Accumulated amortization (13.7) (12.0)
Intangible assets $ 4.4 $ 6.2
[1] 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.