Condensed Consolidating Financial Statements - Statement of Operations and Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Service revenues	$ 101.8	$ 110.2	$ 202.4	$ 226.2
Product sales	127.5	125.0	227.0	262.3
Total revenues	229.3	235.2	429.4	488.5
Cost of service revenues	77.9	83.3	152.0	171.9
Cost of product sales	95.0	91.5	168.4	190.4
Total costs	172.9	174.8	320.4	362.3
Gross profit	56.4	60.4	109.0	126.2
Selling, general and administrative expenses	45.8	46.7	89.9	96.2
Research and development expenses	5.9	4.8	11.1	9.7
Operating income from continuing operations	4.7	8.9	8.0	20.3
Other income (expense):
Interest expense, net	(14.0)	(16.3)	(30.1)	(32.5)
Loss on extinguishment of debt	(39.1)	0	(39.1)	0
Other income (expense), net	0.2	0.2	0.4	(0.6)
Total other expense, net	(52.9)	(16.1)	(68.8)	(33.1)
Loss from continuing operations before income taxes	(48.2)	(7.2)	(60.8)	(12.8)
Provision (benefit) for income taxes from continuing operations	1.6	(0.1)	3.9	2.7
Loss from continuing operations	(49.8)	(7.1)	(64.7)	(15.5)
Income (loss) from discontinued operations	(0.1)	(2.5)	(0.2)	(4.4)
Equity in net income (loss) of subsidiaries	0	0	0	0
Net loss	(49.9)	(9.6)	(64.9)	(19.9)
Comprehensive income (loss)	(49.9)	(9.6)	(65.0)	(19.8)
Parent Company
Condensed Financial Statements, Captions [Line Items]
Service revenues	0	0	0	0
Product sales	0	0	0	0
Total revenues	0	0	0	0
Cost of service revenues	0	0	0	0
Cost of product sales	0	0	0	0
Total costs	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expenses	4.0	1.1	9.0	3.7
Research and development expenses	0	0	0	0
Operating income from continuing operations	(4.0)	(1.1)	(9.0)	(3.7)
Other income (expense):
Interest expense, net	(13.9)	(16.1)	(29.9)	(32.2)
Loss on extinguishment of debt	(39.1)		(39.1)
Other income (expense), net	0.1	0	0	0
Total other expense, net	(52.9)	(16.1)	(69.0)	(32.2)
Loss from continuing operations before income taxes	(56.9)	(17.2)	(78.0)	(35.9)
Provision (benefit) for income taxes from continuing operations	0.2	0.2	0.5	0.5
Loss from continuing operations	(57.1)	(17.4)	(78.5)	(36.4)
Income (loss) from discontinued operations	0	0.1	0	0.1
Equity in net income (loss) of subsidiaries	7.2	7.7	13.6	16.4
Net loss	(49.9)	(9.6)	(64.9)	(19.9)
Comprehensive income (loss)	(49.9)	(9.6)	(65.0)	(19.8)
Guarantors on a Combined Basis
Condensed Financial Statements, Captions [Line Items]
Service revenues	99.9	109.3	198.2	224.8
Product sales	114.7	110.9	201.0	234.2
Total revenues	214.6	220.2	399.2	459.0
Cost of service revenues	76.3	82.6	148.7	170.8
Cost of product sales	86.6	82.8	151.5	173.5
Total costs	162.9	165.4	300.2	344.3
Gross profit	51.7	54.8	99.0	114.7
Selling, general and administrative expenses	38.5	42.4	74.3	86.2
Research and development expenses	5.6	4.5	10.3	9.0
Operating income from continuing operations	7.6	7.9	14.4	19.5
Other income (expense):
Interest expense, net	0.1	0	0.1	0
Loss on extinguishment of debt			0
Other income (expense), net	(0.1)	0.1	0	0.1
Total other expense, net	0	0.1	0.1	0.1
Loss from continuing operations before income taxes	7.6	8.0	14.5	19.6
Provision (benefit) for income taxes from continuing operations	1.1	(0.4)	3.0	2.0
Loss from continuing operations	6.5	8.4	11.5	17.6
Income (loss) from discontinued operations	(0.1)	(2.7)	(0.2)	(4.5)
Equity in net income (loss) of subsidiaries	0.8	2.0	2.3	3.3
Net loss	7.2	7.7	13.6	16.4
Comprehensive income (loss)	7.2	7.7	13.6	16.4
Non-Guarantors on a Combined Basis
Condensed Financial Statements, Captions [Line Items]
Service revenues	1.9	0.9	4.2	1.4
Product sales	15.1	18.8	31.7	37.6
Total revenues	17.0	19.7	35.9	39.0
Cost of service revenues	1.6	0.7	3.3	1.1
Cost of product sales	10.7	13.4	22.6	26.4
Total costs	12.3	14.1	25.9	27.5
Gross profit	4.7	5.6	10.0	11.5
Selling, general and administrative expenses	3.3	3.2	6.6	6.3
Research and development expenses	0.3	0.3	0.8	0.7
Operating income from continuing operations	1.1	2.1	2.6	4.5
Other income (expense):
Interest expense, net	(0.2)	(0.2)	(0.3)	(0.3)
Loss on extinguishment of debt	0		0
Other income (expense), net	0.2	0.1	0.4	(0.7)
Total other expense, net	0	(0.1)	0.1	(1.0)
Loss from continuing operations before income taxes	1.1	2.0	2.7	3.5
Provision (benefit) for income taxes from continuing operations	0.3	0.1	0.4	0.2
Loss from continuing operations	0.8	1.9	2.3	3.3
Income (loss) from discontinued operations	0	0.1	0	0
Equity in net income (loss) of subsidiaries	0	0	0	0
Net loss	0.8	2.0	2.3	3.3
Comprehensive income (loss)	0.8	2.0	2.2	3.2
Eliminations
Condensed Financial Statements, Captions [Line Items]
Service revenues	0	0	0	0
Product sales	(2.3)	(4.7)	(5.7)	(9.5)
Total revenues	(2.3)	(4.7)	(5.7)	(9.5)
Cost of service revenues	0	0	0	0
Cost of product sales	(2.3)	(4.7)	(5.7)	(9.5)
Total costs	(2.3)	(4.7)	(5.7)	(9.5)
Gross profit	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Research and development expenses	0	0	0	0
Operating income from continuing operations	0	0	0	0
Other income (expense):
Interest expense, net	0	0	0	0
Loss on extinguishment of debt	0		0
Other income (expense), net	0	0	0	0
Total other expense, net	0	0	0	0
Loss from continuing operations before income taxes	0	0	0	0
Provision (benefit) for income taxes from continuing operations	0	0	0	0
Loss from continuing operations	0	0	0	0
Income (loss) from discontinued operations	0	0	0	0
Equity in net income (loss) of subsidiaries	(8.0)	(9.7)	(15.9)	(19.7)
Net loss	(8.0)	(9.7)	(15.9)	(19.7)
Comprehensive income (loss)	$ (8.0)	$ (9.7)	$ (15.8)	$ (19.6)