Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Inventory, Net [Abstract]
Raw materials, including parts and subassemblies	$ 400.5	$ 369.2
Work-in-process	58.5	58.1
Finished goods	82.9	83.4
Total inventories	541.9	510.7
Excess of LIFO costs over FIFO costs	13.2	13.2
Inventories	$ 555.1	$ 523.9