EMPLOYEE BENEFIT PLANS (Pre-tax Amounts Recognized in Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Prior service costs	$ 0.0	$ 0.0	$ 0.0
Net actuarial loss (gain)	27.6	(21.1)	(5.9)
Amortization of losses and prior service cost	(0.1)	(0.1)	(0.3)
Total changes in other comprehensive (income) loss	27.5	(21.2)	(6.2)
Prior service costs	(0.5)	(0.5)
Net actuarial (loss) gain	(14.8)	12.7
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(15.3)	12.2
Post-Retirement Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Prior service costs	0.0	0.0	1.8
Net actuarial loss (gain)	(4.0)	(4.0)	1.9
Amortization of losses and prior service cost	(0.4)	(0.7)	(0.6)
Total changes in other comprehensive (income) loss	(4.4)	(4.7)	$ 3.1
Prior service costs	(3.5)	(4.3)
Net actuarial (loss) gain	11.4	7.8
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ 7.9	$ 3.5