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4. Intangible Assets, Goodwill and Other (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Changes to goodwill by segment

Changes to goodwill by segment are as follows (in millions):

			Life Science						Clinical Diagnostics						Total
Balances as of December 31, 2022:
Goodwill			$	333.3					$	408.4					$	741.7
Accumulated impairment losses			(41.8)						(293.4)						(335.2)
Goodwill, net			291.5						115.0						406.5
Acquisitions (see Note 2)			—						0.4						0.4
Foreign currency adjustments			—						0.9						0.9
Period increase, net			—						1.3						1.3
Balances as of March 31, 2023:
Goodwill			333.3						409.7						743.0
Accumulated impairment losses			(41.8)						(293.4)						(335.2)
Goodwill, net			$	291.5					$	116.3					$	407.8

Schedule of identifiable purchased intangible assets with definite lives

Information regarding our identifiable purchased intangible assets with finite and indefinite lives is as follows (in millions):

			March 31, 2023
			Weighted-Average Remaining Amortization Period (years)						Purchase Price						Accumulated Amortization						Net Carrying Amount
Customer relationships/lists			5.0						$	105.7					$	(92.2)					$	13.5
Know how			2.5						167.3						(156.1)						11.2
Developed product technology			12.7						211.9						(124.6)						87.3
Licenses			5.6						59.0						(39.5)						19.5
Tradenames			6.3						6.1						(4.5)						1.6
Covenants not to compete			3.0						6.4						(4.3)						2.1
Total finite-lived intangible assets									556.4						(421.2)						135.2
In-process research and development									192.6						—						192.6
Total purchased intangible assets									$	749.0					$	(421.2)					$	327.8

			December 31, 2022
			Weighted-Average Remaining Amortization Period (years)						Purchase Price						Accumulated Amortization						Net Carrying Amount
Customer relationships/lists			5.0						$	104.7					$	(89.9)					$	14.8
Know how			2.8						166.2						(153.9)						12.3
Developed product technology			12.8						211.1						(121.6)						89.5
Licenses			5.8						59.0						(38.5)						20.5
Tradenames			6.6						6.1						(4.5)						1.6
Covenants not to compete			3.1						6.4						(4.0)						2.4
Total finite-lived intangible assets									553.5						(412.4)						141.1
In-process research and development									191.0						—						191.0
Total purchased intangible assets									$	744.5					$	(412.4)					$	332.1

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

Amortization expense related to purchased intangible assets is as follows (in millions):

			Three Months Ended
			March 31,
			2023						2022
Amortization expense			$	6.0					$	6.3

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