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Goodwill and Other Intangible Assets, Net
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets, Net Goodwill and Other Intangible Assets, Net
The change in the carrying amount of goodwill was as follows:
(in millions)
Balance at December 31, 2024
$51.5 
Foreign currency translation
0.1 
Balance at September 30, 2025
$51.6 
The gross carrying amount, accumulated amortization and net book value of intangible assets at the end of each period were as follows:
September 30, 2025December 31, 2024
(in millions)
Gross
Carrying Amount		Accumulated AmortizationNet
Book Value		Gross
Carrying Amount		Accumulated AmortizationNet
Book Value
Customer relationships$43.2 $(35.2)$7.9 $43.1 $(33.5)$9.6 
Internal-use software62.1 (13.2)48.8 52.4 (15.6)36.8 
Developed technology27.4 (6.4)21.0 27.4 (4.9)22.5 
Patents36.3 (9.0)27.3 36.2 (6.5)29.6 
Total intangible assets$168.9 $(63.9)$105.0 $159.1 $(60.6)$98.5 
Amortization expense for intangible assets was $2.7 million and $2.5 million for the three months ended September 30, 2025 and 2024, respectively, and was $7.7 million and $7.3 million for the nine months ended September 30, 2025 and 2024, respectively.