Discontinued Operations (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 07, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Document Fiscal Year Focus				2017
Total assets (1)		$ 0.7		$ 0.7		$ 0.9
Total liabilities (1)		1.9		1.9		6.0
Earnings (loss) from discontinued operations, net		0.6	$ (17.8)	2.1	$ (34.7)
Audio | Speaker and Receiver Product Line [Member] | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	$ 45.0
Proceeds from Divestiture of Businesses	$ 40.6
Audio | Speaker and Receiver Product Line [Member] | Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of business						25.6
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax						26.9
Revenues		0.0	24.7
Cost of goods sold		(0.1)	27.1
Restructuring charges - cost of goods sold		0.0	7.2
Gross loss		0.1	(9.6)
Research and development expenses		0.0	3.2
Selling and administrative expenses		(0.4)	4.9
Restructuring charges		0.0	1.4
Operating (income) expenses		(0.4)	9.5
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		0.5	(19.1)
Discontinued Operation, Tax Effect of Discontinued Operation		(0.1)	(1.3)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax		0.6	$ (17.8)
Accounts receivable		0.7		0.7		0.6
Prepaid and other current assets		0.0		0.0		0.3
Total current assets		0.7		0.7		0.9
Total assets (1)		0.7		0.7		0.9
Accounts payable		1.3		1.3		2.8
Other current liabilities		0.6		0.6		3.2
Total current liabilities		1.9		1.9		6.0
Total liabilities (1)		$ 1.9		1.9		$ 6.0
Depreciation				0.0	1.1
Additions to property, plant and equipment				0.0	2.5
Mobile Consumer Electronics [Member] | Speaker and Receiver Product Line [Member] | Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues				0.0	45.1
Cost of goods sold				(0.1)	55.7
Restructuring charges - cost of goods sold				0.0	9.3
Gross loss				0.1	(19.9)
Research and development expenses				0.0	6.7
Selling and administrative expenses				(0.5)	8.1
Restructuring charges				0.0	1.8
Operating (income) expenses				(0.5)	16.6
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax				0.6	(36.5)
Discontinued Operation, Tax Effect of Discontinued Operation				(1.5)	(1.8)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax				2.1	(34.7)
Accounts Payable [Member] | Audio | Speaker and Receiver Product Line [Member] | Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additions to property, plant and equipment				$ 0.0	$ 0.7