EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12.1	$ 13.9
Interest cost	4.3	2.0
Expected return on plan assets	(4.8)	(4.4)
Net periodic benefit cost	11.6	11.5
Post-Retirement Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.2	0.2
Interest cost	0.2	0.1
Amortization of prior service cost and actuarial loss	0.0	0.1
Net periodic benefit cost	$ 0.4	$ 0.4