Restructuring and Related Activities - Restructuring Charges by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Document Fiscal Year Focus			2017
Restructuring charges	$ 2.8	$ 3.7	$ 3.5	$ 7.2
Expected cost remaining	0.2		0.2
Restructuring and Related Cost, Incurred Cost			7.2
Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.2	3.9	7.2	8.6
Severance Pay and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			5.8
Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			1.4
Operating Segments | Precision Devices | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.1	0.8
Operating Segments | Audio | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.7	3.1
Operating Segments | Mobile Consumer Electronics [Member] | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5.4	6.1
Operating Segments | Specialty Components [Member] | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0.3	2.1
Corporate | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.4	0.0	1.5	0.4
Cost of Goods Sold, Restructuring Charges [Member] | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(0.6)		3.7
Operating Expense [Member] | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.8		3.5
Operating Expense [Member] | Audio | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.4		1.5
Operating Expense [Member] | Precision Devices | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.1		0.3
Operating Expense [Member] | Audio | Severance Pay and Contract Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1.3		$ 1.7
Audience, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3.9		8.6
Audience, Inc. [Member] | Cost of Goods Sold, Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0.2		1.4
Audience, Inc. [Member] | Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 3.7		$ 7.2