Leases - Components of Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating lease income:
Variable lease income	$ 267.5	$ 264.6	$ 788.7	$ 795.0
Operating Lease, Variable Lease Income	22.6	17.4	65.1	51.9
Operating Lease, Lease Income	290.1	282.0	853.8	846.9
Finance lease income	2.3	1.9	6.8	5.2
Total lease income	292.4	283.9	860.6	852.1
Total operating lease income	$ 20.3	$ 18.9	$ 61.2	$ 54.6