Warranty (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Product Warranties Disclosures [Abstract]
Machine warranty, range minimum (in years)	1 year
Machine warranty, range maximum (in years)	4 years
Period of time following a sale the majority of claims are paid, range minimum (in years)	6 months
Period of time following a sale the majority of claims are paid, range maximum (in years)	9 months
Changes in warranty reserves
Beginning balance	$ 13.1	$ 12.7
Additions charged to expense	2.5	3.3
Foreign currency fluctuations	0.0	0.1
Claims paid	(3.0)	(3.3)
Ending balance	$ 12.6	$ 12.8