Leases - Supplemental Balance Sheet Information (Details) $ in Millions	Sep. 30, 2019 USD ($)
Operating Leases
Operating lease assets, net	$ 68.9
Other current liabilities	$ 20.4
Other current liabilities (Balance sheet location)	Us-gaap:OtherLiabilitiesCurrent
Operating lease liability - long term	$ 50.7
Finance Leases
Property, plant and equipment, net	$ 1.5
Property, plant and equipment, net (Balance sheet location)	Us-gaap:PropertyPlantAndEquipmentNet
Current portion of long-term debt	$ 0.4
Current portion of long-term debt (Balance sheet location)	Us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
Long-term debt	$ 1.0
Long-term debt (Balance sheet location)	Us-gaap:LongTermDebtAndCapitalLeaseObligations
Weighted average remaining lease term
Operating leases	5 years 2 months 12 days
Finance leases	3 years 6 months
Weighted average discount rate
Operating leases	2.50%
Finance leases	2.80%