EMPLOYEE BENEFIT PLANS (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 55.6	$ 57.5	$ 59.0
Interest cost	7.9	5.3	6.9
Expected return on plan assets	(17.5)	(14.2)	(12.5)
Amortization of prior service cost and actuarial loss	0.1	0.1	0.3
Net periodic benefit cost	46.1	48.7	53.7
Post-Retirement Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.8	1.1	1.0
Interest cost	0.3	0.3	0.4
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service cost and actuarial loss	0.4	0.7	0.6
Net periodic benefit cost	$ 1.5	$ 2.1	$ 2.0