CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Income Statement [Abstract]
Service revenues	$ 87.4	$ 97.1	$ 263.5	$ 299.5
Product sales	74.3	93.7	216.1	271.4
Total revenues	161.7	190.8	479.6	570.9
Cost of service revenues	65.4	77.7	198.5	229.7
Cost of product sales	55.9	70.7	161.5	206.9
Total costs	121.3	148.4	360.0	436.6
Gross profit	40.4	42.4	119.6	134.3
Selling, general and administrative expenses	34.9	40.4	112.6	119.3
Research and development expenses	3.5	4.9	11.7	13.6
Unused office space and other restructuring expenses	0.4	0.1	1.3	1.7
Operating income (loss) from continuing operations	1.6	(3.0)	(6.0)	(0.3)
Other income (expense):
Interest expense, net	(9.5)	(8.7)	(27.3)	(30.5)
Loss on extinguishment of debt	(3.4)	0.0	(3.4)	(39.1)
Other income (expense), net	0.3	0.2	(0.6)	0.1
Total other expense, net	(12.6)	(8.5)	(31.3)	(69.5)
Loss from continuing operations before income taxes	(11.0)	(11.5)	(37.3)	(69.8)
Provision (benefit) for income taxes from continuing operations	(15.3)	(0.2)	(11.1)	3.1
Income (loss) from continuing operations	4.3	(11.3)	(26.2)	(72.9)
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)	77.0	0.4	75.0	(2.3)
Income tax expense	(26.2)	0.0	(25.0)	(0.6)
Income (loss) from discontinued operations	50.8	0.4	50.0	(2.9)
Net income (loss)	$ 55.1	$ (10.9)	$ 23.8	$ (75.8)
Basic income (loss) per common share:
Net income (loss) from continuing operations (in dollars per share)	$ 0.07	$ (0.20)	$ (0.45)	$ (1.27)
Net income (loss) from discontinued operations (in dollars per share)	0.86	0.01	0.85	(0.05)
Net income (loss) per common share (in dollars per share)	0.93	(0.19)	0.40	(1.32)
Diluted income (loss) per common share:
Net income (loss) from continuing operations (in dollars per share)	0.07	(0.20)	(0.45)	(1.27)
Net income (loss) from discontinued operations (in dollars per share)	0.85	0.01	0.85	(0.05)
Net income (loss) per common share (in dollars per share)	$ 0.92	$ (0.19)	$ 0.40	$ (1.32)
Weighted average common shares outstanding:
Basic (in shares)	59.0	57.8	58.6	57.6
Diluted (in shares)	60.0	57.8	58.6	57.6
Comprehensive Income (Loss)
Net income (loss)	$ 55.1	$ (10.9)	$ 23.8	$ (75.8)
Change in cumulative translation adjustment	0.1	(0.1)	0.2	(0.2)
Comprehensive income (loss)	$ 55.2	$ (11.0)	$ 24.0	$ (76.0)