Leases Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 4.0	$ 4.2	$ 4.3
Short-term lease cost	2.9	3.9	2.6
Finance Lease, Amortization of right-of-use asset	0.7	0.7	0.7
Finance Lease, Interest on lease liability	0.4	0.4	0.5
Total lease cost	$ 8.0	$ 9.2	$ 8.1