Leases - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Lease cost
Operating lease cost	$ 11.1	$ 11.7
Finance lease cost:
Amortization of right-of-use assets	2.2	1.5
Interest on finance lease liabilities	0.1	0.1
Short-term lease cost	0.4	0.1
Sublease (income)	0.2	0.2
Variable lease cost	3.2	2.8
Total lease cost	$ 16.8	$ 16.0