Leases - Components of Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Operating lease revenue:
Fixed lease revenue	$ 345.3	$ 320.8	$ 1,015.6	$ 937.0
Variable lease revenue	28.6	27.6	80.3	77.3
Operating Lease, Lease Income	373.9	348.4	1,095.9	1,014.3
Finance lease revenue	3.2	3.3	9.6	10.3
Total lease revenue	377.1	351.7	1,105.5	1,024.6
Additional lease revenue	34.9	29.7	102.7	86.5
Gain (Loss) On Finance Lease, Liability	$ 0.0	$ 4.6	$ 10.0	$ 8.9