Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
Operating cash flows from operating leases	$ 8.0
Operating cash flows from finance leases	0.2
Financing cash flows from finance leases	2.1
Right-of-use assets obtained in exchange for Operating Leases	9.8	$ 0.0
Right-of-use assets obtained in exchange for Finance leases	$ 1.2	$ 0.0