Leases - Summary of Lease Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 4.1	$ 3.5	$ 7.9	$ 6.9
Variable Lease, Cost	0.1	0.1	0.2	0.2
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	3.8	3.7	7.5	7.3
ROU asset obtained in exchange for new operating lease liabilities	$ 6.4	$ 0.3	$ 77.1	$ 5.4