Other Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Other Income and Expenses [Abstract]
Severance and post-employment benefits	$ 0.0	$ 1.4	$ 0.0	$ 7.8
Asset-related charges	0.0	0.9	0.0	15.9
Total restructuring and related charges	0.0	2.3	0.0	23.7	$ 26.4
Venezuela currency devaluation	0.0	0.0	0.0	2.7
Venezuela deconsolidation	0.0	0.0	11.1	0.0
Development and licensing income	(9.5)	(0.4)	(10.3)	(1.2)
Contingent consideration costs	(0.2)	0.0	0.5	1.9
Other items	0.2	0.6	1.8	2.0
Total other (income) expense	$ (9.5)	$ 2.5	$ 3.1	$ 29.1