Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 420.8	$ 349.6	$ 1,151.4	$ 945.5
Operating expenses:
Cost of sales	299.3	255.5	817.5	678.8
Selling, general and administrative expense	73.7	56.5	221.2	168.4
Research and development expense	6.9	6.3	19.6	17.7
Restructuring expense	0.3	0.3	1.3	9.4
Other (income) expense, net	(1.6)	1.5	(0.6)	2.1
Operating income	42.2	29.5	92.4	69.1
Interest expense	(3.6)	(2.8)	(10.3)	(7.0)
Income from continuing operations before income taxes	38.6	26.7	82.1	62.1
Provision for income taxes	12.2	6.1	19.8	17.5
Income from continuing operations	26.4	20.6	62.3	44.6
Loss from discontinued operations, net of income taxes	(0.6)	0.0	(1.2)	(0.1)
Net income	$ 25.8	$ 20.6	$ 61.1	$ 44.5
Basic earnings per share:
Income from continuing operations (in dollars per share)	$ 0.83	$ 0.70	$ 1.99	$ 1.52
Loss from discontinued operations (in dollars per share)	(0.02)	0.00	(0.04)	(0.01)
Net income (in dollars per share)	0.81	0.70	1.95	1.51
Diluted earnings per share:
Income from continuing operations (in dollars per share)	0.82	0.69	1.97	1.50
Loss from discontinued operations (in dollars per share)	(0.02)	0.00	(0.04)	(0.01)
Net income (in dollars per share)	0.80	0.69	1.93	1.49
Cash dividends declared per share (in dollars per share)	$ 0.1	$ 0.1	$ 0.3	$ 0.3