Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Components of inventories
Finished goods	$ 429.2	$ 330.5
Work in process	5.4	10.0
Raw materials and parts	225.3	229.1
Subtotal	659.9	569.6
Excess of current cost over last-in, first-out cost	(59.8)	(59.8)
Total inventories, net	$ 600.1	$ 509.8