Leases Long-Term Operating Lease Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 24.9
Operating Leases, Future Minimum Payments, Due in Two Years	17.2
Operating Leases, Future Minimum Payments, Due in Three Years	11.5
Operating Leases, Future Minimum Payments, Due in Four Years	2.4
Operating Leases, Future Minimum Payments, Due in Five Years	0.8
Operating Leases, Future Minimum Payments, Due Thereafter	2.9
Operating Leases, Undiscounted Interest	(6.7)
Operating Lease, Liability	53.0
Current operating lease liabilities	21.7	$ 18.0
Operating lease liabilities	$ 31.3	$ 44.8