PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Jun. 30, 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				Six Months Ended
In millions	Jun 30, 2021		Jun 30, 2020		Jun 30, 2021		Jun 30, 2020
Defined Benefit Pension Plans
Service cost	$	96	$	99	$	198	$	198
Interest cost	150		191		293		383
Expected return on plan assets	(435)		(412)		(857)		(826)
Amortization of prior service credit	(5)		(5)		(10)		(10)
Amortization of net loss	200		192		424		384
Curtailment gain	—		—		(19)		—
Net periodic benefit cost	$	6	$	65	$	29	$	129
Other Postretirement Benefit Plans
Service cost	$	2	$	2	$	4	$	4
Interest cost	5		10		11		19
Amortization of net gain	(1)		(3)		(3)		(5)
Net periodic benefit cost	$	6	$	9	$	12	$	18