PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Net Periodic Benefit Cost Relating to Pension and Other Postemployment Employee Benefit Plans

The following is a summary of net periodic benefit cost relating to our pension and OPEB plans.

	Three months ended September 30,				Nine months ended September 30,
(in millions)	2020		2019		2020		2019
Pension benefits
Service cost	$	20	$	18	$	61	$	56
Interest cost	24		47		71		137
Expected return on plan assets	(40)		(74)		(121)		(214)
Amortization of net losses and prior service costs	19		15		57		44
Net periodic pension cost	$	23	$	6	$	68	$	23
OPEB
Interest cost	$	2	$	2	$	4	$	6
Amortization of net loss and prior service credit	(5)		(7)		(13)		(21)
Net periodic OPEB cost (income)	$	(3)	$	(5)	$	(9)	$	(15)