Leases - Schedule of Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Lease cost	$ 2.1	$ 1.8	$ 4.1	$ 3.5
Less: sublease income	0.1	0.1	0.2	0.2
Net lease cost	$ 2.0	$ 1.7	$ 3.9	$ 3.3