CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Income Statement [Abstract]
Service revenues	$ 82.6	$ 87.3
Product sales	70.4	69.8
Total revenues	153.0	157.1
Cost of service revenues	60.3	66.0
Cost of product sales	56.8	52.8
Total costs	117.1	118.8
Gross profit	35.9	38.3
Selling, general and administrative expenses	37.7	37.4
Research and development expenses	2.9	3.9
Unused office space, restructuring expenses, and other	5.5	0.9
Operating loss from continuing operations	(10.2)	(3.9)
Other income (expense):
Interest expense, net	(8.7)	(8.8)
Other income, net	0.3	0.1
Total other expense, net	(8.4)	(8.7)
Loss from continuing operations before income taxes	(18.6)	(12.6)
Provision for income taxes from continuing operations	3.6	1.9
Loss from continuing operations	(22.2)	(14.5)
Discontinued operations
Loss from operations of discontinued component	0.0	(1.3)
Income tax expense	0.0	(0.4)
Loss from discontinued operations	0.0	(1.7)
Net loss	$ (22.2)	$ (16.2)
Basic loss per common share:
Net loss from continuing operations (in dollars per share)	$ (0.37)	$ (0.25)
Net loss from discontinued operations (in dollars per share)	0.00	(0.03)
Net loss per common share (in dollars per share)	(0.37)	(0.28)
Diluted loss per common share:
Net loss from continuing operations (in dollars per share)	(0.37)	(0.25)
Net loss from discontinued operations (in dollars per share)	0.00	(0.03)
Net loss per common share (in dollars per share)	$ (0.37)	$ (0.28)
Weighted average common shares outstanding:
Basic (in shares)	59.6	58.3
Diluted (in shares)	59.6	58.3
Comprehensive Loss
Net loss	$ (22.2)	$ (16.2)
Change in cumulative translation adjustment	0.0	(0.2)
Comprehensive loss	$ (22.2)	$ (16.4)