Leases - Lease Obligations (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Finance leases - ROU assets	$ 59.6	$ 55.0
Finance leases - Accumulated depreciation	(32.8)	(31.7)
Operating leases - ROU assets	191.7	156.7
Operating leases - Accumulated depreciation	(99.1)	(86.5)
Total lease assets	119.4	93.5
Finance leases	(6.3)	(7.6)
Operating leases	(29.2)	(24.0)
Finance leases	(21.5)	(16.1)
Operating leases	(66.0)	(49.6)
Total lease liabilities	$ (123.0)	$ (97.3)