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Goodwill and Other Intangible Assets, Net
 3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets, Net Goodwill and Other Intangible Assets, Net
The carrying amount of goodwill was $51.5 million at both March 31, 2025 and December 31, 2024.
The gross carrying amount, accumulated amortization and net book value of intangible assets at the end of each period were as follows:
March 31, 2025December 31, 2024
(in millions)
Gross
Carrying Amount		Accumulated AmortizationNet
Book Value		Gross
Carrying Amount		Accumulated AmortizationNet
Book Value
Customer relationships$43.1 $(34.1)$9.0 $43.1 $(33.5)$9.6 
Internal-use software56.1 (16.2)39.9 52.4 (15.6)36.8 
Developed technology27.4 (5.4)22.0 27.4 (4.9)22.5 
Patents36.2 (7.3)28.9 36.2 (6.6)29.6 
Total intangible assets$162.8 $(63.0)$99.8 $159.1 $(60.6)$98.5 
Amortization expense for intangible assets was $2.4 million for both the three months ended March 31, 2025 and 2024.