Other Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Severance and post-employment benefits	$ 0.3	$ 2.0
Asset-related charges	0.0	0.1
Other charges	0.3	1.2
Total restructuring and related charges	0.6	3.3
Development and licensing income	(0.2)	(0.2)
Contingent consideration	0.2	0.3
Other items	(2.9)	(0.3)
Total other (income) expense	$ (2.3)	$ 3.1