Leases - Supplemental Balance Sheet (Details) $ in Millions	Jun. 30, 2019 USD ($)
Operating Leases:
Operating lease right-of-use assets	$ 43.8
Current portion of operating lease liabilities	12.1
Operating lease liabilities, net of current portion	37.8
Finance leases:
Property, plant and equipment, net	38.6
Other current liabilities	0.6
Other long-term liabilities	$ 38.7