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Segment Information - Reportable Segments Adjusted Working Capital and Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Document Fiscal Year Focus	2016
Revenues	$ 859.3	$ 849.6	$ 915.0
Total assets	1,515.1	1,696.5
Disposal Group, Including Discontinued Operation, Assets	0.9	93.0
Operating segments | Mobile Consumer Electronics
Segment Reporting Information [Line Items]
Total assets	976.4	1,059.0
Operating segments | Specialty Components
Segment Reporting Information [Line Items]
Total assets	535.7	542.7
Intra-segment eliminations
Segment Reporting Information [Line Items]
Total assets	$ 2.1	$ 1.8

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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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