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Segment Information - Information on Reportable Segments (Details) $ in Millions			3 Months Ended								12 Months Ended
		Jan. 01, 2017 segment	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Document Fiscal Year Focus											2016
Number of reportable segments | segment		2									2
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues			$ 240.6	$ 243.1	$ 190.3	$ 185.3	$ 223.5	$ 246.7	$ 192.8	$ 186.6	$ 859.3	$ 849.6	$ 915.0
Reconciliation of Net Earnings from Segments [Abstract]
Interest expense, net											20.4	12.7	6.6
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	[1]										30.8	22.6	132.5
Provision for income taxes											11.7	6.1	12.9
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent			$ 17.5	$ 20.9	$ (6.8)	$ (12.5)	$ (6.6)	$ 4.8	$ 13.3	$ 5.0	19.1	16.5	119.6
Reconciliation of Depreciation and Amortization [Abstract]
Depreciation and amortization											73.0	76.8	75.4
Reconciliation of Research and Development Expense [Abstract]
Research and development expenses											100.5	92.8	64.1
Operating segments
Reconciliation of Net Earnings from Segments [Abstract]
(Loss) earnings before interest and income taxes	[1]										(103.2)	(91.6)	(182.5)
Reconciliation of Capital Expenditures [Abstract]
Capital expenditures											34.2	48.4	61.2
Reconciliation of Research and Development Expense [Abstract]
Research and development expenses											100.5	92.8	64.1
Operating segments | Mobile Consumer Electronics
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues											439.8	421.7	457.8
Reconciliation of Net Earnings from Segments [Abstract]
(Loss) earnings before interest and income taxes											(29.0)	(30.6)	(113.0)
Reconciliation of Depreciation and Amortization [Abstract]
Depreciation and amortization											48.7	49.0	48.5
Reconciliation of Capital Expenditures [Abstract]
Capital expenditures											23.7	22.9	39.9
Reconciliation of Research and Development Expense [Abstract]
Research and development expenses											72.5	64.6	36.2
Operating segments | Specialty Components
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues											419.5	427.9	457.2
Reconciliation of Net Earnings from Segments [Abstract]
(Loss) earnings before interest and income taxes											(74.2)	(61.0)	(69.5)
Reconciliation of Depreciation and Amortization [Abstract]
Depreciation and amortization											21.0	25.1	24.8
Reconciliation of Capital Expenditures [Abstract]
Capital expenditures											9.7	19.9	16.6
Reconciliation of Research and Development Expense [Abstract]
Research and development expenses											27.9	28.2	27.9
Corporate, Non-Segment [Member]
Reconciliation of Net Earnings from Segments [Abstract]
(Loss) earnings before interest and income taxes											52.0	56.3	43.4
Reconciliation of Depreciation and Amortization [Abstract]
Depreciation and amortization											3.3	2.7	2.1
Reconciliation of Capital Expenditures [Abstract]
Capital expenditures											0.8	5.6	4.7
Reconciliation of Research and Development Expense [Abstract]
Research and development expenses											$ 0.1	$ 0.0	$ 0.0
[1] Years Ended December 31,(in millions)2016 2015 2014Revenue: Mobile Consumer Electronics$439.8 $421.7 $457.8Specialty Components419.5 427.9 457.2Total consolidated revenue$859.3 $849.6 $915.0 Earnings from continuing operations before interest and income taxes: Mobile Consumer Electronics$29.0 $30.6 $113.0Specialty Components74.2 61.0 69.5Total segments103.2 91.6 182.5Corporate expense / other52.0 56.3 43.4Interest expense, net20.4 12.7 6.6Earnings from continuing operations before interest and income taxes30.8 22.6 132.5Provision for income taxes11.7 6.1 12.9Earnings from continuing operations$19.1 $16.5 $119.6 Depreciation and amortization: Mobile Consumer Electronics$48.7 $49.0 $48.5Specialty Components21.0 25.1 24.8Corporate3.3 2.7 2.1Total$73.0 $76.8 $75.4 Capital expenditures: Mobile Consumer Electronics$23.7 $22.9 $39.9Specialty Components9.7 19.9 16.6Corporate0.8 5.6 4.7Total$34.2 $48.4 $61.2 Research and development: Mobile Consumer Electronics$72.5 $64.6 $36.2Specialty Components27.9 28.2 27.9Corporate0.1 — —Total$100.5 $92.8 $64.1

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