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EMPLOYEE BENEFIT PLANS (Pre-tax Amounts in AOCI Not Yet Recognized as Components of Net Periodic Costs) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Prior service costs $ (0.4) $ (0.5)
Net actuarial (loss) gain (24.4) (14.8)
Total (24.8) (15.3)
Post-Retirement Medical Plan    
Defined Benefit Plan Disclosure [Line Items]    
Prior service costs (8.7) (3.5)
Net actuarial (loss) gain 10.9 11.4
Total $ 2.2 $ 7.9