EMPLOYEE BENEFITS (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of net benefit cost (credit)

The following tables show the components of net periodic benefit cost (credit) for our benefit plans.

	Pension Benefits
	Three Months Ended September 30				Nine Months Ended September 30
(in millions)	2020		2019		2020		2019
Service cost	$	2.5	$	2.2	$	7.4	$	6.5
Interest cost	6.3		7.0		18.9		21.1
Expected return on plan assets	(12.1)		(11.9)		(36.4)		(35.9)
Amortization of net actuarial loss	5.9		4.4		17.8		13.3
Net periodic benefit cost	$	2.6	$	1.7	$	7.7	$	5.0

	OPEB Benefits
	Three Months Ended September 30				Nine Months Ended September 30
(in millions)	2020		2019		2020		2019
Service cost	$	1.1	$	1.0	$	3.3	$	3.1
Interest cost	1.2		1.6		3.8		4.9
Expected return on plan assets	(4.5)		(4.1)		(13.6)		(12.4)
Amortization of prior service credit	(2.6)		(2.9)		(7.9)		(8.6)
Amortization of net actuarial (gain) loss	(0.3)		0.4		(1.0)		1.2
Net periodic benefit credit	$	(5.1)	$	(4.0)	$	(15.4)	$	(11.8)