Leases - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 16.0	$ 15.5	$ 14.2
Finance lease cost, Amortization	2.6	2.9	4.0
Finance lease cost, Interest on lease liabilities	2.6	2.7	2.9
Short-term lease cost	0.5	0.5	0.8
Total lease costs	$ 21.7	$ 21.6	$ 21.9