INDUSTRY SEGMENT INFORMATION Operating Profit by Industry Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	$ 494	$ 428	$ 939	$ 940
Earnings (loss) before income taxes and equity earnings	432	261	831	245
Interest expense, net	57	116	149	233
Noncontrolling interests adjustment	(1)	0	(2)	0
Corporate expenses, net	7	(3)	32	29
Corporate net special items	101	54	70	87
Business net special items	(50)	14	(36)	366
Non-operating pension expense (income)	(52)	(14)	(105)	(20)
Industrial Packaging
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	408	449	855	919
Global Cellulose Fibers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	10	(10)	(72)	(64)
Printing Papers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	$ 76	$ (11)	$ 156	$ 85