Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 186.7	$ 179.7	$ 531.8	$ 581.6
Cost of sales	141.4	125.0	394.1	411.3
Gross profit	45.3	54.7	137.7	170.3
Selling, engineering, general and administrative expenses	31.1	29.5	91.0	91.0
Acquisition and integration related expenses	0.3	0.0	1.2	0.0
Restructuring	0.4	0.0	1.6	0.4
Operating income	13.5	25.2	43.9	78.9
Interest expense	0.6	0.6	1.4	1.8
Debt settlement charges	0.0	0.0	0.3	0.0
Other (income) expense, net	(0.3)	0.3	(1.3)	1.5
Income from continuing operations before income taxes	13.2	24.3	43.5	75.6
Income tax expense	(5.7)	(8.5)	(16.2)	(27.2)
Income from continuing operations	7.5	15.8	27.3	48.4
Gain from discontinued operations and disposal, net of income tax (benefit) expense of $(1.0), $1.8, $3.1 and $1.7, respectively	1.0	3.0	3.9	3.6
Net income	$ 8.5	$ 18.8	$ 31.2	$ 52.0
Basic earnings per share:
Earnings from continuing operations (usd per share)	$ 0.12	$ 0.25	$ 0.45	$ 0.77
Gain from discontinued operations and disposal, net of tax (usd per share)	0.02	0.05	0.06	0.06
Net earnings per share (usd per share)	0.14	0.30	0.51	0.83
Diluted earnings per share:
Earnings from continuing operations (usd per share)	0.12	0.25	0.45	0.76
Gain from discontinued operations and disposal, net of tax (usd per share)	0.02	0.05	0.06	0.06
Net earnings per share (usd per share)	$ 0.14	$ 0.30	$ 0.51	$ 0.82
Weighted average common shares outstanding:
Basic (shares)	59.8	62.3	60.7	62.4
Diluted (shares)	60.6	63.3	61.5	63.4
Cash dividends declared per common share (usd per share)	$ 0.07	$ 0.06	$ 0.21	$ 0.18