Leases - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 10.1	$ 9.1
Operating cash flows for finance leases	0.1	0.1
Financing cash flows for finance leases	0.7	0.4
ROU assets obtained in exchange for lease obligations:
Operating leases	3.2	11.6
Finance leases	$ 0.0	$ 0.5