Other Expense (Income) - Other Expense (Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Restructuring and related charges	$ 0.4	$ 4.5	$ 2.5	$ 4.5
Fixed asset impairments and loss (gain) on sale of equipment	0.2	0.9	0.6	7.2
Contingent consideration	0.1	0.8	0.9	0.9
Foreign exchange transaction losses (gains)	0.4	1.0	(2.5)	(4.5)
Other items	0.7	(0.5)	1.5	(1.9)
Total other expense (income)	$ 1.8	$ 6.7	$ 3.0	$ 6.2