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Intangible assets
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible assets Intangible assets
The Company’s finite-lived intangible assets consist of products acquired via business combinations or asset acquisitions. The following table summarizes the Company’s finite-lived intangible assets:
Weighted Average Useful Life in YearsSeptember 30, 2025December 31, 2024
Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Products13.5$855.4 $402.7 $452.7 $855.4 $353.9 $501.5 
Total intangible assets$855.4 $402.7 $452.7 $855.4 $353.9 $501.5 
Amortization expense associated with the Company’s finite-lived intangible assets was recorded as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Amortization of intangible assets$16.3 $16.3 $48.8 $48.8