PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Net Periodic Benefit Cost for All Significant Plans

The following table provides the components of the Corporation's net periodic benefit cost (credit) for all significant plans:

Net Periodic Benefit Cost (Credit) for All Significant Plans	Three Months Ended				Nine Months Ended
In millions	Sep 30, 2023		Sep 30, 2022		Sep 30, 2023		Sep 30, 2022
Defined Benefit Pension Plans
Service cost	$	8	$	10	$	25	$	28
Interest cost	38		21		112		67
Expected return on plan assets	(52)		(57)		(156)		(170)
Amortization of prior service credit	—		—		—		(1)
Amortization of net loss	16		28		48		82
Net periodic benefit cost	$	10	$	2	$	29	$	6
Other Postretirement Benefit Plan
Service cost	$	—	$	1	$	—	$	1
Interest cost	2		1		5		3
Amortization of net gain	(4)		(3)		(11)		(7)
Net periodic benefit credit	$	(2)	$	(1)	$	(6)	$	(3)