Discontinued Operations and Special Charges (Gains) - Reconciliation of Pretax Loss on Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Net sales	$ 0.0	$ 77.1	$ 0.0	$ 352.0
Cost of sales	0.0	66.2	0.0	295.8
Gross profit	0.0	10.9	0.0	56.2
Selling, distribution & administrative expenses	1.1	6.7	1.9	36.0
Pre-tax book gain on sale of France business	0.0	(178.2)	0.0	(178.2)
Special charges (gains)	0.0	1.4	(0.1)	0.7
Operating (loss) income from discontinued operations	(1.1)	181.0	(1.8)	197.7
Interest and other (income) expenses, net	0.0	0.1	0.0	(0.2)
Income (loss) from discontinued operations before income taxes	(1.1)	180.9	(1.8)	197.9
Provision (benefit) for income taxes	(0.1)	17.2	(0.2)	23.5
Net income (loss) from discontinued operations	$ (1.0)	$ 163.7	$ (1.6)	$ 174.4
Net income (loss) per share – basic (in dollars per share)	$ (0.03)	$ 4.40	$ (0.04)	$ 4.69
Net income (loss) per share – diluted (in dollars per share)	$ (0.03)	$ 4.32	$ (0.04)	$ 4.59