PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2021

Postemployment Benefits [Abstract]

Schedule of Net Benefit Costs

The following are the components of defined benefit pension and OPEB costs (credits):

Defined Benefit Pension Costs (Credits)

	(In Millions)
	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Service cost	$	14	$	5	$	42	$	16
Interest cost	26		20		78		43
Expected return on plan assets	(89)		(38)		(269)		(93)
Amortization:
Prior service costs	1		1		1		1
Net actuarial loss	8		8		24		21
Net periodic benefit credits	$	(40)	$	(4)	$	(124)	$	(12)

OPEB Costs (Credits)

	(In Millions)
	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Service cost	$	13	$	1	$	38	$	3
Interest cost	19		4		56		11
Expected return on plan assets	(10)		(4)		(30)		(13)
Amortization:
Prior service credits	(2)		(1)		(2)		(2)
Net actuarial loss	1		1		3		2
Net periodic benefit costs	$	21	$	1	$	65	$	1