PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

3 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The following table provides the components of the Company's net periodic benefit cost for all significant plans:

Net Periodic Benefit Cost for All Significant Plans	Three Months Ended
In millions	Mar 31, 2021		Mar 31, 2020
Defined Benefit Pension Plans
Service cost	$	102	$	99
Interest cost	143		192
Expected return on plan assets	(422)		(414)
Amortization of prior service credit	(5)		(5)
Amortization of net loss	224		192
Curtailment gain	(19)		—
Net periodic benefit cost	$	23	$	64
Other Postretirement Benefit Plans
Service cost	$	2	$	2
Interest cost	6		9
Amortization of net gain	(2)		(2)
Net periodic benefit cost	$	6	$	9