Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental cash flow information related to leases
Operating cash flows from finance leases	$ 0.1	$ 0.1	$ 0.0
Operating cash flows from operating leases	21.2	24.0	27.1
Financing cash flows from finance leases	1.6	0.9	$ 0.4
Right-of-use assets obtained in exchange for lease liabilities
Operating leases	21.2	24.3
Finance leases	$ 2.7	$ 2.6