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Cloud Computing Costs
9 Months Ended
Sep. 30, 2025
Research and Development [Abstract]  
Cloud Computing Costs Cloud Computing Costs
Capitalized costs to implement cloud computing arrangements at cost and accumulated amortization were as follows: 
(in millions)September 30, 2025December 31, 2024
Short-term portion$42.4 $31.7 
Long-term portion149.3 135.3 
Total capitalized implementation costs191.7 167.0 
Less: accumulated amortization(86.2)(62.4)
Capitalized implementation costs, net$105.5 $104.6 
Amortization expense was $8.4 million and $6.9 million for the three months ended September 30, 2025 and 2024, respectively, and was $23.9 million and $19.5 million for the nine months ended September 30, 2025 and 2024, respectively.