Leases - Lease Cost Finance And Operating Leases (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
General and Administrative Expense [Member]
Variable Lease, Cost	$ 0.6	$ 0.5	$ 1.9	$ 1.5
Short-term Lease, Cost	0.2	0.2	0.6	0.6
Cost of Sales [Member]
Variable Lease, Cost	$ 0.2	$ 0.2	$ 0.6	$ 0.7