Leases (Schedule of Lease Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease Cost [Abstract]
Operating lease cost	$ 0.7	$ 1.7	$ 4.2	$ 5.0
Finance lease cost, Amortization of leased assets	1.3		1.3
Finance lease cost, Interest on lease liabilities	$ 0.4		$ 0.4