Leases - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 13.5	$ 11.5
Variable lease cost	0.1	0.0
Finance lease cost:
Amortization of right-of-use assets	0.6	0.6
Interest on lease liabilities	0.0	0.1
Total finance lease cost	0.6	0.7
Short-term lease cost	$ 4.3	$ 2.5