Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

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, 2020	$	1,274.0	$	978.7	(1)	$	2,252.7
Acquisitions (2)	21.9		291.6			313.5
Foreign currency translation and other	(6.5)		(26.3)			(32.8)
Balance at September 30, 2021	$	1,289.4	$	1,244.0		$	2,533.4

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

(2) The Company completed the Coventya Acquisition and the HKW Acquisition on September 1, 2021 and May 5, 2021, respectively.

Schedule of finite-lived intangible assets subject to amortization

Intangible assets subject to amortization were as follows:

	September 30, 2021						December 31, 2020
(dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Customer relationships	$	1,135.3	$	(487.0)	$	648.3	$	984.3	$	(435.4)	$	548.9
Developed technology	429.3		(235.8)		193.5		400.0		(241.5)		158.5
Trade names	100.0		(15.7)		84.3		91.8		(11.3)		80.5
Other	—		—		—		1.7		(1.7)		—
Total	$	1,664.6	$	(738.5)	$	926.1	$	1,477.8	$	(689.9)	$	787.9