Discontinued Operations - Income Statement (Details) - USD ($) $ 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	$ 6.4	$ 0.2	$ 26.8
Cost of sales	0.0	5.0	0.2	18.9
Gross profit	0.0	1.4	0.0	7.9
Selling and marketing expenses	0.0	2.6	0.1	10.2
General, administrative and other expenses	0.3	1.6	2.1	4.8
Operating loss	(0.3)	(2.8)	(2.2)	(7.1)
Interest (income) expense, net and other	(1.2)	(0.3)	(1.5)	3.8
Income (loss) from discontinued operations before income taxes	0.9	(2.5)	(0.7)	(10.9)
Income tax provision	(0.1)	(0.2)	(0.1)	0.0
Income (loss) from discontinued operations, net of tax	$ 0.8	$ (2.7)	$ (0.8)	$ (10.9)