Other Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Abstract]
Severance and post-employment benefits	$ 1.3	$ 0.0	$ 3.3	$ 0.0
Asset-related charges	0.3	0.0	0.4	0.0
Other charges	0.6	0.0	1.8	0.0
Total restructuring and related charges	2.2	0.0	5.5	0.0
Venezuela deconsolidation	0.0	11.1	0.0	11.1
Development and licensing income	(0.2)	(0.4)	(0.4)	(0.8)
Contingent consideration	0.3	0.4	0.6	0.7
Other items	(1.2)	0.6	(1.5)	1.6
Total other expense	$ 1.1	$ 11.7	$ 4.2	$ 12.6