Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 235.8	$ 204.4	$ 679.2	$ 597.3
Cost of sales	153.6	133.2	444.5	389.4
Gross profit	82.2	71.2	234.7	207.9
Selling, distribution & administrative expenses	62.9	58.6	186.0	173.1
Special charges	0.9	0.1	0.9	0.3
Operating income from continuing operations	18.4	12.5	47.8	34.5
Interest and other (income) expense, net	(0.3)	0.2	(0.2)	(0.2)
Income from continuing operations before income taxes	18.7	12.3	48.0	34.7
Provision for income taxes	3.6	1.0	10.8	1.8
Net income from continuing operations	15.1	11.3	37.2	32.9
Income (loss) from discontinued operations, net of tax	163.7	0.0	174.4	(26.3)
Net income	$ 178.8	$ 11.3	$ 211.6	$ 6.6
Net income per common share from continuing operations:
Basic (in dollars per share)	$ 0.41	$ 0.31	$ 1.00	$ 0.89
Diluted (in dollars per share)	0.40	0.30	0.98	0.88
Net income (loss) per common share from discontinued operations:
Basic (in dollars per share)	4.40	0.00	4.69	(0.71)
Diluted (in dollars per share)	4.32	0.00	4.59	(0.70)
Net income per common share:
Basic (in dollars per share)	4.81	0.31	5.69	0.18
Diluted (in dollars per share)	$ 4.72	$ 0.30	$ 5.57	$ 0.18
Weighted average common and common equivalent shares:
Basic (in shares)	37.2	37.0	37.2	37.0
Diluted (in shares)	37.9	37.7	38.0	37.4
Dividends declared (in dollars per share)	$ 0.11	$ 0.1	$ 1.33	$ 0.25