GOODWILL AND OTHER INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETSGoodwill and in-process research and development assets resulting from purchase business combinations are not subject to amortization. Other acquired intangible assets with finite lives are amortized over their expected useful lives on a straight-line basis, or if reliably determinable, based on the pattern in which the economic benefit of the asset is expected to be used. The Company expenses costs incurred to renew or extend the term of acquired intangible assets.

In 2022, the Company recorded a $52.7 million impairment charge related to certain of its developed technology and in-process research and development assets. See Note 4 for further information.

The changes in the carrying amount of goodwill, by segment, during the years ended December 31, 2022 and 2021 were as follows:


	United States		Europe		Rest of World		Total
	(in millions)
Goodwill at December 31, 2020	$	773.7	$	68.3	$	331.2	$	1,173.2

Currency translation adjustment	—		(5.3)		—		(5.3)
Goodwill at December 31, 2021	773.7		63.0		331.2		1,167.9

Currency translation adjustment	—		(3.6)		—		(3.6)
Goodwill at December 31, 2022	$	773.7	$	59.4	$	331.2	$	1,164.3

Other intangible assets consist of the following (in millions):


		December 31,
	Weighted-Average Useful Life (in years)	2022						2021
		Cost		Accumulated Amortization		Net Carrying Value		Cost		Accumulated Amortization		Net Carrying Value
Finite-lived intangible assets
Patents	8.8	$	205.5	$	(185.0)	$	20.5	$	185.7	$	(184.2)	$	1.5
Developed technology	12.2	128.1		(57.9)		70.2		153.9		(55.5)		98.4
Other	10.0	12.2		(7.7)		4.5		12.4		(6.8)		5.6
	11.3	345.8		(250.6)		95.2		352.0		(246.5)		105.5
Indefinite-lived intangible assets
In-process research and development		190.0		—		190.0		218.1		—		218.1
		$	535.8	$	(250.6)	$	285.2	$	570.1	$	(246.5)	$	323.6

Amortization expense related to other intangible assets for the years ended December 31, 2022, 2021, and 2020 was $5.7 million, $7.7 million, and $5.4 million, respectively. Estimated amortization expense for each of the years ending December 31 is as follows (in millions):


2023	$	5.6
2024	5.3
2025	4.8
2026	5.8
2027	6.2