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Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying value of goodwill by reportable segment for the years ended December 31, 2018 and 2017 are as follows:

(in millions)	Audio				Precision Devices				Total
Balance at January 1, 2017	$	846.6			$	25.0			$	871.6
Foreign currency translation	13.3				—				13.3
Balance at December 31, 2017	859.9				25.0				884.9
Acquisition	—				3.0				3.0
Balance at December 31, 2018	$	859.9			$	28.0			$	887.9

Schedule of Finite-Lived Intangible Assets

The gross carrying value and accumulated amortization for each major class of intangible assets are as follows:

	December 31, 2018								December 31, 2017
(in millions)	Gross Carrying Amount				Accumulated Amortization				Gross Carrying Amount				Accumulated Amortization
Amortized intangible assets:
Trademarks	$	0.5			$	0.2			$	0.3			$	0.2
Patents	40.8				26.9				40.8				22.2
Customer relationships	10.6				2.0				3.3				0.7
Unpatented technologies	4.4				2.7				2.4				2.2
Other	0.2				—				—				—
Total	56.5				31.8				46.8				25.3
Unamortized intangible assets:
Trademarks	32.0								32.0
Total intangible assets, net	$	56.7							$	53.5

Schedule of Intangible Assets

The gross carrying value and accumulated amortization for each major class of intangible assets are as follows:

	December 31, 2018								December 31, 2017
(in millions)	Gross Carrying Amount				Accumulated Amortization				Gross Carrying Amount				Accumulated Amortization
Amortized intangible assets:
Trademarks	$	0.5			$	0.2			$	0.3			$	0.2
Patents	40.8				26.9				40.8				22.2
Customer relationships	10.6				2.0				3.3				0.7
Unpatented technologies	4.4				2.7				2.4				2.2
Other	0.2				—				—				—
Total	56.5				31.8				46.8				25.3
Unamortized intangible assets:
Trademarks	32.0								32.0
Total intangible assets, net	$	56.7							$	53.5

Goodwill and Other Intangible Assets

7. Goodwill and Other Intangible Assets

The changes in the carrying value of goodwill by reportable segment for the years ended December 31, 2018 and 2017 are as follows:

(in millions)	Audio				Precision Devices				Total
Balance at January 1, 2017	$	846.6			$	25.0			$	871.6
Foreign currency translation	13.3				—				13.3
Balance at December 31, 2017	859.9				25.0				884.9
Acquisition	—				3.0				3.0
Balance at December 31, 2018	$	859.9			$	28.0			$	887.9

The gross carrying value and accumulated amortization for each major class of intangible assets are as follows:

	December 31, 2018								December 31, 2017
(in millions)	Gross Carrying Amount				Accumulated Amortization				Gross Carrying Amount				Accumulated Amortization
Amortized intangible assets:
Trademarks	$	0.5			$	0.2			$	0.3			$	0.2
Patents	40.8				26.9				40.8				22.2
Customer relationships	10.6				2.0				3.3				0.7
Unpatented technologies	4.4				2.7				2.4				2.2
Other	0.2				—				—				—
Total	56.5				31.8				46.8				25.3
Unamortized intangible assets:
Trademarks	32.0								32.0
Total intangible assets, net	$	56.7							$	53.5

Total amortization expense for the years ended December 31, 2018, 2017, and 2016 was $6.5 million, $7.3 million, and $18.2 million, respectively. Amortization expense is primarily recorded in Selling and administrative expenses in the Consolidated Statements of Earnings. Amortization expense for the next five years, based on current intangible balances, is estimated to be as follows:

(in millions)
2019	$	6.4
2020	6.4
2021	6.3
2022	1.1
2023	1.0

Schedule of Future Amortization Expense

Amortization expense for the next five years, based on current intangible balances, is estimated to be as follows:

(in millions)
2019	$	6.4
2020	6.4
2021	6.3
2022	1.1
2023	1.0

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