Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Components of inventories
Finished goods	$ 404.2	$ 330.5
Work in process	7.2	10.0
Raw materials and parts	233.5	229.1
Subtotal	644.9	569.6
Excess of current cost over last-in, first-out cost	(59.6)	(59.8)
Total inventories, net	$ 585.3	$ 509.8