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INVESTMENTS - Contractual Maturity (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Amortized Cost    
Due in one year or less $ 33.2  
Due after one year through five years 78.4  
Due five years through 10 years 7.1  
Due after 10 years 14.2  
Amortized Cost 132.9 $ 129.5
Fair Value    
Due in one year or less 32.9  
Due after one year through five years 76.1  
Due five years through 10 years 6.8  
Due after 10 years 13.8  
Total $ 129.6 $ 129.9