Leases - Supplemental Balance Sheet Information (Details) $ in Millions	Jun. 30, 2019 USD ($)
Operating Leases
Operating lease assets, net	$ 74.5
Other current liabilities	$ 21.5
Other current liabilities (Balance sheet location)	Us-gaap:OtherLiabilitiesCurrent
Operating lease liability - long term	$ 55.4
Finance Leases
Property, plant and equipment, net	$ 1.2
Property, plant and equipment, net (Balance sheet location)	Us-gaap:PropertyPlantAndEquipmentNet
Current portion of long-term debt	$ 0.3
Current portion of long-term debt (Balance sheet location)	Us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
Long-term debt	$ 0.7
Long-term debt (Balance sheet location)	Us-gaap:LongTermDebtAndCapitalLeaseObligations
Weighted average remaining lease term
Operating leases	5 years 3 months 18 days
Finance leases	3 years 6 months
Weighted average discount rate
Operating leases	2.50%
Finance leases	1.60%