Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

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


	EIG		EMG		Total
	(In millions)
Balance at December 31, 2021	$	4,073.8	$	1,164.9	$	5,238.7
Goodwill acquired	197.8		—		197.8
Purchase price allocation adjustments and other	1.8		—		1.8
Foreign currency translation adjustments	(37.3)		(28.4)		(65.7)
Balance at December 31, 2022	4,236.1		1,136.5		5,372.6
Goodwill acquired	79.3		932.4		1,011.7
Purchase price allocation adjustments and other	24.8		—		24.8
Foreign currency translation adjustments	24.8		13.7		38.5
Balance at December 31, 2023	$	4,365.0	$	2,082.6	$	6,447.6

Other intangible assets were as follows at December 31:


	2023		2022
	(In thousands)
Definite-lived intangible assets (subject to amortization):
Patents	$	47,239	$	46,418
Purchased technology	914,100		722,277
Customer lists	3,743,457		3,023,762
	4,704,796		3,792,457
Accumulated amortization:
Patents	(38,105)		(37,215)
Purchased technology	(334,229)		(269,155)
Customer lists	(1,190,906)		(1,033,658)
	(1,563,240)		(1,340,028)
Net intangible assets subject to amortization	3,141,556		2,452,429
Indefinite-lived intangible assets (not subject to amortization):
Trademarks and trade names	1,023,761		889,656


	$	4,165,317	$	3,342,085

Amortization expense was $215.1 million, $205.8 million, and $183.6 for the years ended December 31, 2023, 2022 and 2021, respectively. Amortization expense for each of the next five years is expected to approximate $251 million per year, not considering the impact of potential future acquisitions.