Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flow from operating leases	$ 9.4	$ 9.1
Operating cash flows from finance leases	0.0	0.1
Financing cash flows from finance leases	0.6	1.3
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for new lease obligations	9.1	19.8
Finance lease right-of-use assets obtained in exchange for new lease obligations	$ 0.4	$ 1.2