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Marketable Securities and Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Available-for-Sale Marketable Securities
The following is a summary of the Company’s available for sale marketable securities measured at fair value on a recurring basis.
December 31, 2025
(dollars in millions)
Valuation
Hierarchy
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Corporate bondsLevel 2$528.0 $1.1 $— $529.1 
Government securitiesLevel 213.3 0.1 — 13.4 
Total$541.3 $1.2 $— $542.5 
December 31, 2024
(dollars in millions)
Valuation
Hierarchy
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Corporate bondsLevel 2$934.4 $1.7 $(0.7)$935.4 
Government securitiesLevel 23.5 — — 3.5 
Total$937.9 $1.7 $(0.7)$938.9