Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating cash flows from operating leases	$ 8.7	$ 24.8
Operating cash flows from finance leases	0.1	0.5
Financing cash flows from finance leases	0.6	3.2
Right-of-use assets obtained in exchange for Operating Leases	15.2	44.4	$ 0.0
Right-of-use assets obtained in exchange for Finance leases	$ 0.4	$ 1.9	$ 2.8