EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2020

Defined Benefit Plan [Abstract]

Schedule of net periodic benefit cost

The components of net periodic benefit cost related to the Company’s defined benefit plans consisted of the following:

(in millions)	Three Months Ended March 31,
Pension Benefits	2020		2019
Components of net periodic benefit cost:
Service cost	$	13.8	$	10.9
Interest cost	1.8		2.1
Expected return on plan assets	(3.1)		(2.4)
Amortization of prior service cost and actuarial loss	0.1		0.1
Net periodic benefit cost	$	12.6	$	10.7

(in millions)	Three Months Ended March 31,
Post-Retirement Medical Plan	2020		2019
Components of net periodic benefit cost:
Service cost	$	0.3	$	0.2
Interest cost	0.1		0.2
Amortization of prior service cost and actuarial loss	0.1		0.1
Net periodic benefit cost	$	0.5	$	0.5