Leases - Schedule of Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Lease cost	$ 1.6	$ 1.9	$ 5.7	$ 5.4
Less: sublease income	0.1	0.1	0.3	0.3
Net lease cost	$ 1.5	$ 1.8	$ 5.4	$ 5.1