Leases - Other information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 6.4	$ 6.6
Operating cash flows from finance leases	1.1	1.2
Financing cash flows from finance leases	22.2	10.7
Right-of-use assets obtained in exchange for lease obligations: Finance leases	11.5	20.5
Right-of-use assets obtained in exchange for lease obligations: Operating leases	$ 1.0	$ 5.8