PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS (Tables)

6 Months Ended

Jun. 30, 2023

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 June 30,				Six months ended June 30,
(in millions)	2023		2022		2023		2022
Pension benefits
Service cost	$	7	$	21	$	13	$	40
Interest cost	35		24		72		48
Expected return on plan assets	(43)		(40)		(87)		(79)
Amortization of net losses and prior service costs	1		11		2		23
Net periodic pension cost	$	—	$	16	$	—	$	32
OPEB
Interest cost	$	2	$	1	$	4	$	2
Amortization of net loss and prior service credit	(6)		(3)		(12)		(6)
Net periodic OPEB cost (income)	$	(4)	$	(2)	$	(8)	$	(4)