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FAIR VALUE MEASURES (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Investments, Fair Value Disclosure $ 37.0   $ 39.0
Debt Instrument, Fair Value Disclosure 243.0   253.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net 0.0 $ 0.0  
Equity Securities [Member]      
Investments, Fair Value Disclosure 24.0   26.0
Fixed Income Securities [Member]      
Investments, Fair Value Disclosure 13.0   $ 13.0
Available-for-sale Securities      
Equity Securities, FV-NI, Unrealized Gain (Loss) $ 2.0 $ 2.0