Leases - Cash Flow Statement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases
Operating cash flows from operating leases	$ 27.9	$ 32.4
Financing cash flows from finance leases	0.4	0.7
Financing cash flows from finance leases	0.5	0.6	$ 1.1
Non-cash recognition of ROU asset	11.4	1.2
Non-cash recognition of lease liability	$ 11.4	$ 1.2