Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Inventories carried at LIFO:
Finished goods	$ 54.4	$ 48.6
Raw materials, production parts and work-in-process	31.0	28.6
LIFO reserve	(31.5)	(31.2)
Total LIFO inventories	53.9	46.0
Inventories carried at FIFO:
Inventory, Finished goods, FIFO	64.6	53.5
Raw materials, production parts and work-in-process	39.7	35.6
Total FIFO inventories	104.3	89.1
Total inventories	$ 158.2	$ 135.1