CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Revenues	$ 373.2	$ 372.4	$ 742.5	$ 716.0
Costs and expenses:
Cost of products sold	259.2	264.2	514.4	524.6
Selling, general and administrative	75.8	78.2	154.7	154.9
Intangible amortization	2.4	2.4	5.0	4.0
Special charges, net	1.4	1.3	1.7	1.4
Other operating (income) expense	0.0	0.0	(0.4)	1.8
Operating income	34.4	26.3	67.1	29.3
Other income, net	5.8	1.9	6.5	9.1
Interest expense	(4.8)	(5.3)	(9.5)	(10.6)
Interest income	0.1	0.6	0.1	0.9
Income from continuing operations before income taxes	35.5	23.5	64.2	28.7
Income tax provision	(7.1)	(4.1)	(13.1)	(8.7)
Income from continuing operations	28.4	19.4	51.1	20.0
Income (loss) from discontinued operations, net of tax	0.0	0.0	0.0	0.0
Loss on disposition of discontinued operations, net of tax	(1.3)	(0.2)	(1.3)	(1.6)
Loss from discontinued operations, net of tax	(1.3)	(0.2)	(1.3)	(1.6)
Net income	$ 27.1	$ 19.2	$ 49.8	$ 18.4
Basic income per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.64	$ 0.44	$ 1.15	$ 0.46
Income (loss) from discontinued operations (in dollars per share)	(0.03)	0	(0.03)	(0.04)
Net income per share (in dollars per share)	$ 0.61	$ 0.44	$ 1.12	$ 0.42
Weighted-average number of common shares outstanding — basic	44,590	43,914	44,452	43,767
Diluted income per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.62	$ 0.43	$ 1.12	$ 0.45
Income (loss) from discontinued operations (in dollars per share)	(0.03)	0	(0.03)	(0.04)
Net income per share (in dollars per share)	$ 0.59	$ 0.43	$ 1.09	$ 0.41
Weighted-average number of common shares outstanding — diluted	45,648	44,892	45,620	44,750
Comprehensive income	$ 31.0	$ 15.3	$ 40.8	$ 16.2