Inventories (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Inventory
Raw materials and supplies	$ 97.7	$ 72.1
Work in process	53.0	37.1
Finished goods	82.4	64.5
Inventories, net	233.1	173.7
Increase in inventory	59.4
Inventory valuation reserve	9.0	$ 7.1
VRV
Inventory
Inventories, net	$ 49.0