Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill by segment

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

(dollars in millions)	Electronics		Industrial & Specialty			Total
Balance at December 31, 2019	$	1,223.4	$	956.2	(1)	$	2,179.6
Foreign currency translation	(19.7)		(32.7)			(52.4)
Balance at March 31, 2020	$	1,203.7	$	923.5		$	2,127.2

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

Schedule of finite-lived intangible assets subject to amortization

Intangible assets subject to amortization were as follows:

	March 31, 2020						December 31, 2019
(dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Customer lists	$	933.5	$	(359.6)	$	573.9	$	959.1	$	(351.4)	$	607.7
Developed technology	371.9		(199.5)		172.4		380.5		(194.8)		185.7
Tradenames	86.4		(6.2)		80.2		51.5		(4.9)		46.6
Non-compete agreements	—		—		—		1.6		(1.6)		—
Total	$	1,391.8	$	(565.3)	$	826.5	$	1,392.7	$	(552.7)	$	840.0