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SHORT-TERM INVESTMENTS - Contracted Maturities of Short-Term Investments (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Mar. 31, 2022
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Amortized cost, Due in 1 year or less $ 334.2  
Amortized cost, Due in 1-2 years 19.5  
Cost or Amortized Cost 353.7 $ 825.9
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Fair value, Due in 1 year or less 329.2  
Fair value, Due in 1-2 years 18.8  
Total fair value $ 348.0 $ 820.1