Other Expense (Income) - Other Expense (Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Income and Expenses [Abstract]
Restructuring and related charges	$ 1.2	$ 0.0
Fixed asset impairments and loss (gain) on sale of equipment	0.1	0.2
Contingent consideration	0.7	0.0
Foreign exchange transaction gains	(0.3)	(3.5)
Other items	2.2	(0.2)
Total other expense (income)	$ 3.9	$ (3.5)