EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2021

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [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	2021		2020
Components of net periodic benefit cost:
Service cost	$	14.4	$	13.8
Interest cost	1.3		1.8
Expected return on plan assets	(3.6)		(3.1)
Amortization of prior service cost and actuarial loss	—		0.1
Net periodic benefit cost	$	12.1	$	12.6

(in millions)	Three Months Ended March 31,
Post-Retirement Medical Plan	2021		2020
Components of net periodic benefit cost:
Service cost	$	0.4	$	0.3
Interest cost	0.1		0.1
Amortization of prior service cost and actuarial loss	0.2		0.1
Net periodic benefit cost	$	0.7	$	0.5