RETIREMENT PLANS (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Net Periodic Pension Expense for Qualified and Nonqualified U.S. Defined Benefit Plans [Table Text Block]

Net periodic pension (income) expense for our qualified and nonqualified U.S. defined benefit plans comprised the following: 

	Three Months Ended June 30,				Six Months Ended June 30,
In millions	2021		2020		2021		2020
Service cost	$	25	$	23	$	52	$	43
Interest cost	84		98		167		196
Expected return on plan assets	(183)		(167)		(366)		(334)
Actuarial loss	40		46		79		101
Amortization of prior service cost	5		5		11		10
Net periodic pension (income) expense	$	(29)	$	5	$	(57)	$	16