CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Income Statement [Abstract]
Service revenues	$ 87.2	$ 87.4	$ 258.0	$ 263.5
Product sales	78.2	74.3	228.6	216.1
Total revenues	165.4	161.7	486.6	479.6
Cost of service revenues	64.7	65.4	189.4	198.5
Cost of product sales	74.8	55.9	190.2	161.5
Total costs	139.5	121.3	379.6	360.0
Gross profit	25.9	40.4	107.0	119.6
Selling, general and administrative expenses	35.5	34.9	109.6	112.6
Research and development expenses	3.2	3.5	10.1	11.7
Unused office space, restructuring expenses, and other	0.2	0.4	10.5	1.3
Operating income (loss) from continuing operations	(13.0)	1.6	(23.2)	(6.0)
Other income (expense):
Interest expense, net	(8.7)	(9.5)	(26.1)	(27.3)
Loss on extinguishment of debt	0.0	(3.4)	0.0	(3.4)
Other income (expense), net	0.1	0.3	0.6	(0.6)
Total other expense, net	(8.6)	(12.6)	(25.5)	(31.3)
Loss from continuing operations before income taxes	(21.6)	(11.0)	(48.7)	(37.3)
Provision (benefit) for income taxes from continuing operations	1.9	(15.3)	7.3	(11.1)
Income (loss) from continuing operations	(23.5)	4.3	(56.0)	(26.2)
Discontinued operations
Income (loss) from operations of discontinued component (including gain on disposal of $80.3 million for the three and nine months ended September 27, 2015)	(0.1)	77.0	(0.1)	75.0
Income tax expense	0.0	(26.2)	(0.1)	(25.0)
Income (loss) from discontinued operations	(0.1)	50.8	(0.2)	50.0
Net income (loss)	$ (23.6)	$ 55.1	$ (56.2)	$ 23.8
Basic income (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	$ (0.39)	$ 0.07	$ (0.93)	$ (0.45)
Income from discontinued operations (in dollars per share)	0.00	0.86	(0.01)	0.85
Net income (loss) per common share (in dollars per share)	(0.39)	0.93	(0.94)	0.40
Diluted income (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	(0.39)	0.07	(0.93)	(0.45)
Income from discontinued operations (in dollars per share)	0.00	0.85	(0.01)	0.85
Net income (loss) per common share (in dollars per share)	$ (0.39)	$ 0.92	$ (0.94)	$ 0.40
Weighted average common shares outstanding:
Weighted average common shares outstanding - Basic (in shares)	60.5	59.0	60.0	58.6
Weighted average common shares outstanding - Diluted (in shares)	60.5	60.0	60.0	58.6
Comprehensive Income (Loss)
Net income (loss)	$ (23.6)	$ 55.1	$ (56.2)	$ 23.8
Change in cumulative translation adjustment	(0.1)	0.1	(0.2)	0.2
Comprehensive income (loss)	$ (23.7)	$ 55.2	$ (56.4)	$ 24.0