Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for lease liabilities
Operating cash flows from operating leases	$ 19.0	$ 21.3	$ 22.9
Operating cash flows from finance leases	0.3	0.5	0.7
Financing cash flows from finance leases	2.8	3.1	3.5
Right-of-use assets obtained in exchange for lease obligations
Operating leases	0.0	2.1	4.2
Finance leases	$ 1.5	$ 0.4	$ 1.8