Other Expense (Income) - Other Expense (Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring and related charges:
Fixed asset impairments	$ 6.3	$ 1.2	$ 6.5	$ 1.6
Development and licensing income	(0.2)	(0.2)	(0.4)	(0.4)
Contingent consideration	0.1	0.1	0.1	0.3
Foreign exchange transaction gains	(2.0)	(4.8)	(5.5)	(8.6)
Other items	(1.2)	(0.2)	(1.2)	0.3
Total other expense (income)	3.0	(2.5)	(0.5)	(4.8)
2018 Restructuring Plan
Restructuring and related charges:
Severance and post-employment benefits	0.0	1.3	0.0	1.6
Other charges	0.0	0.1	0.0	0.4
Total restructuring and related charges	$ 0.0	$ 1.4	$ 0.0	$ 2.0