Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill by segment were as follows:


(dollars in millions)	Electronics		Industrial & Specialty			Total
Balance at December 31, 2017	$	1,261.9	$	990.7	(1)	$	2,252.6
Addition from acquisition ⁽²⁾	11.1		—			11.1
Foreign currency translation and other	(46.3)		(34.8)			(81.1)
Balance at December 31, 2018	1,226.7		955.9		(1)	2,182.6
Addition from acquisition ⁽³⁾	7.6		—			7.6

Foreign currency translation and other	(10.9)		0.3			(10.6)
Balance at December 31, 2019	$	1,223.4	$	956.2	(1)	$	2,179.6

⁽¹⁾Includes accumulated impairment losses of $46.6 million.

⁽²⁾In May 2018, the Company completed the acquisition of Hi-Tech Korea Co., Ltd. The impact of this acquisition on the Company's results of operations was not material.

⁽³⁾In December 2019, the Company completed the acquisition of the Kester businesses. The impact of this acquisition on the Company's results of operations was not material.

Schedule of Finite-Lived Intangible Assets

Intangible assets subject to amortization were as follows:


	December 31, 2019										December 31, 2018
(dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Customer lists	$	959.1	$	(351.4)	$	607.7	$	927.8	$	(283.2)	$	644.6
Developed technology	380.5		(194.8)		185.7		381.3		(155.6)		225.7
Trade names	51.5		(4.9)		46.6		5.9		(1.6)		4.3
Non-compete agreement	1.6		(1.6)		—		1.5		(1.3)		0.2
Total	$	1,392.7	$	(552.7)	$	840.0	$	1,316.5	$	(441.7)	$	874.8

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated future amortization of intangible assets for each of the next five years is as follows:


(dollars in millions)	Amortization Expense
2020	$	115.4
2021	108.8
2022	95.8
2023	93.3
2024	83.5