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Restructuring and Related Activities - Restructuring Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 0.5	$ 12.3	$ 6.0
Document Fiscal Year Focus	2021
Restructuring Reserve [Roll Forward]
Beginning balance	$ 2.6	1.4	0.8
Restructuring charges	0.5	10.6	6.0
Payments	(2.7)	(9.4)	(5.4)
Ending balance	0.4	2.6	1.4
Intelligent Audio
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		8.3
Severance Pay and Benefits
Restructuring Reserve [Roll Forward]
Beginning balance	1.9	1.4	0.8
Restructuring charges	0.5	9.4	6.0
Payments	(2.0)	(8.9)	(5.4)
Ending balance	0.4	1.9	1.4
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0.7	0.0	0.0
Restructuring charges	0.0	1.2	0.0
Payments	(0.7)	(0.5)	0.0
Ending balance	0.0	0.7	0.0
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.0	1.7	0.4
Audio
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.4	10.5	4.8
Precision Devices
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.1	0.1	0.8
Restructuring Charges [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges	0.5	10.0	4.3
Cost of Goods Sold, Restructuring Charges [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 0.0	2.3	$ 1.7
Cost of Goods Sold, Restructuring Charges [Member] | Severance Pay and Benefits | Intelligent Audio
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		5.4
Cost of Goods Sold, Restructuring Charges [Member] | Severance Pay and Benefits | Audio
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		4.0
Cost of Goods Sold, Restructuring Charges [Member] | Facility Closing [Member] | Intelligent Audio
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1.7
Cost of Goods Sold, Restructuring Charges [Member] | Contract Termination | Intelligent Audio
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1.2

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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