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Intangible Assets
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets GOODWILL AND INTANGIBLE ASSETS
Acquisitions
There were no material acquisitions in 2024, 2023, or 2022.
Goodwill
The following table summarizes the changes in the carrying amount of goodwill (in millions):
Amount
Balance as of December 31, 2022
$348.5 
Acquisition activity— 
Translation and other0.2 
Balance as of December 31, 2023
348.7 
Acquisition activity— 
Translation and other(1.2)
Balance as of December 31, 2024
$347.5 
The Company completed its annual goodwill impairment test and determined that no impairment existed. As of December 31, 2024, there has been no impairment of goodwill.
Intangible Assets
The following table summarizes the components of gross intangible asset, accumulated amortization, and net intangible asset balances as of December 31, 2024, and 2023 (in millions):
December 31, 2024December 31, 2023
Gross Carrying AmountAccumulated AmortizationNet
Carrying
Amount		Gross Carrying AmountAccumulated AmortizationNet
Carrying
Amount
Patents and developed technology$203.3 $(185.4)$17.9 $206.3 $(178.4)$27.9 
Customer relationships27.3 (22.3)5.0 32.5 (22.9)9.6 
Distribution rights and others1.2 (1.1)0.1 10.8 (9.2)1.6 
Total intangible assets$231.8 $(208.8)$23.0 $249.6 $(210.5)$39.1 
Amortization expense related to intangible assets was $16.7 million, $20.2 million, and $27.8 million for the years ended December 31, 2024, 2023, and 2022, respectively.
The estimated future amortization expense related to intangible assets as of December 31, 2024, is as follows (in millions):
Fiscal YearAmount
2025$12.2 
20265.4 
20273.0 
20281.4 
20290.6 
2030 and thereafter0.4 
Total$23.0 
The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, measurement period adjustments to intangible assets, changes in foreign currency exchange rates, impairments of intangible assets, accelerated amortization of intangible assets, and other events.