CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Income Statement [Abstract]
Service revenues	$ 88.8	$ 101.8	$ 176.1	$ 202.4
Product sales	71.7	102.4	141.3	175.6
Total revenues	160.5	204.2	317.4	378.0
Cost of service revenues	67.1	77.9	133.1	152.0
Cost of product sales	52.5	78.2	105.1	134.1
Total costs	119.6	156.1	238.2	286.1
Gross profit	40.9	48.1	79.2	91.9
Selling, general and administrative expenses	40.3	40.3	77.7	78.9
Research and development expenses	4.3	4.6	8.2	8.7
Unused office space and other restructuring	0.0	0.9	0.9	1.6
Operating income (loss) from continuing operations	(3.7)	2.3	(7.6)	2.7
Other income (expense):
Interest expense, net	(8.9)	(9.9)	(17.7)	(21.7)
Loss on extinguishment of debt	0.0	(39.1)	0.0	(39.1)
Other expense, net	(1.0)	(0.2)	(0.9)	(0.1)
Total other expense, net	(9.9)	(49.2)	(18.6)	(60.9)
Loss from continuing operations before income taxes	(13.6)	(46.9)	(26.2)	(58.2)
Provision for income taxes from continuing operations	2.3	1.2	4.2	3.3
Loss from continuing operations	(15.9)	(48.1)	(30.4)	(61.5)
Discontinued operations
Loss from operations of discontinued component	(0.7)	(1.4)	(2.1)	(2.8)
Income tax benefit (expense)	1.6	(0.4)	1.2	(0.6)
Income (loss) from discontinued operations	0.9	(1.8)	(0.9)	(3.4)
Net loss	$ (15.0)	$ (49.9)	$ (31.3)	$ (64.9)
Basic and diluted loss per common share:
Net loss from continuing operations (in dollars per share)	$ (0.27)	$ (0.84)	$ (0.52)	$ (1.07)
Net (loss) income from discontinued operations (in dollars per share)	0.02	(0.03)	(0.02)	(0.06)
Net loss per common share (in dollars per share)	$ (0.25)	$ (0.87)	$ (0.54)	$ (1.13)
Basic and diluted weighted average shares outstanding	58.4	57.4	58.3	57.4
Comprehensive Loss
Net loss	$ (15.0)	$ (49.9)	$ (31.3)	$ (64.9)
Change in cumulative translation adjustment	0.3	0.0	0.1	(0.1)
Comprehensive loss	$ (14.7)	$ (49.9)	$ (31.2)	$ (65.0)