CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Total revenues	$ 159.4	$ 157.1	$ 453.6	$ 437.0
Total costs	115.3	119.9	329.4	326.2
Gross profit	44.1	37.2	124.2	110.8
Selling, general and administrative expenses	29.5	32.9	89.4	94.8
Research and development expenses	4.4	4.2	11.6	12.7
Restructuring expenses and other	0.1	0.0	3.5	0.3
Operating income from continuing operations	10.1	0.1	19.7	3.0
Other income (expense):
Interest expense, net	(5.0)	(7.7)	(15.8)	(23.1)
Loss on extinguishment of debt	0.0	0.0	0.0	(2.1)
Other income (expense), net	(0.3)	0.6	(0.6)	0.9
Total other expense, net	(5.3)	(7.1)	(16.4)	(24.3)
Income (loss) from continuing operations before income taxes	4.8	(7.0)	3.3	(21.3)
Provision (benefit) for income taxes from continuing operations	3.4	(1.1)	4.4	1.6
Loss from continuing operations	1.4	(5.9)	(1.1)	(22.9)
Discontinued operations
Income (loss) from operations of discontinued components	0.5	2.9	(9.1)	4.5
Income tax benefit (expense)	(0.2)	(1.3)	2.0	(2.1)
Income (loss) from discontinued operations	0.3	1.6	(7.1)	2.4
Net income (loss)	$ 1.7	$ (4.3)	$ (8.2)	$ (20.5)
Basic income (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	$ 0.01	$ (0.07)	$ (0.01)	$ (0.27)
Income (loss) from continuing operations (in dollars per share)	0.01	0.02	(0.07)	0.03
Net income (loss) per common share (in dollars per share)	0.02	(0.05)	(0.08)	(0.24)
Diluted income (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	0.01	(0.07)	(0.01)	(0.27)
Income (loss) from discontinued operations (in dollars per share)	0.01	0.02	(0.07)	0.03
Net income (loss) per common share (in dollars per share)	$ 0.02	$ (0.05)	$ (0.08)	$ (0.24)
Weighted average common shares outstanding:
Basic (in shares)	103.9	90.5	103.8	85.0
Diluted (in shares)	106.4	90.5	103.8	85.0
Comprehensive Income (loss)
Net income (loss)	$ 1.7	$ (4.3)	$ (8.2)	$ (20.5)
Change in cumulative translation adjustment	0.0	(0.2)	0.0	(0.1)
Comprehensive income (loss)	1.7	(4.5)	(8.2)	(20.6)
Service
Total revenues	54.9	47.6	147.9	150.6
Total costs	34.3	32.7	100.4	106.8
Product
Total revenues	104.5	109.5	305.7	286.4
Total costs	$ 81.0	$ 87.2	$ 229.0	$ 219.4