Leases - Schedule of Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Lease cost	$ 7.7	$ 7.2
Less: sublease income	0.4	0.4
Net lease cost	$ 7.3	$ 6.8