v3.26.1
INVESTMENTS - Marketable Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost $ 58.2 $ 53.3
Total Net Gains 0.2 0.7
Total Net Losses (0.3) 0.0
Fair Value 58.1 54.0
Fair Value of Securities with Contractual Maturities    
Within 1 Year 8.6 7.8
After 1 Year through 5 Years 36.1 37.8
After 5 Years 13.4 8.4
U.S. Treasury    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 20.1 21.4
Total Net Gains 0.0 0.2
Total Net Losses (0.1) 0.0
Fair Value 20.0 21.6
Fair Value of Securities with Contractual Maturities    
Within 1 Year 3.6 3.7
After 1 Year through 5 Years 12.1 14.5
After 5 Years 4.3 3.4
Municipal securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 10.5 10.4
Total Net Gains 0.1 0.2
Total Net Losses (0.1) 0.0
Fair Value 10.5 10.6
Fair Value of Securities with Contractual Maturities    
Within 1 Year 1.6 0.1
After 1 Year through 5 Years 7.5 9.0
After 5 Years 1.4 1.5
Corporate debt    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 27.6 21.5
Total Net Gains 0.1 0.3
Total Net Losses (0.1) 0.0
Fair Value 27.6 21.8
Fair Value of Securities with Contractual Maturities    
Within 1 Year 3.4 4.0
After 1 Year through 5 Years 16.5 14.3
After 5 Years $ 7.7 $ 3.5