INDUSTRY SEGMENT INFORMATION Operating Profit by Industry Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	$ 631	$ 473	$ 1,570	$ 1,413
Earnings (loss) before income taxes and equity earnings	916	282	1,747	527
Interest expense, net	93	112	242	345
Noncontrolling interests adjustment	(1)	0	(3)	0
Corporate expenses, net	12	(20)	44	9
Corporate net special items	11	108	81	195
Business net special items	(349)	2	(385)	368
Non-operating pension expense (income)	(51)	(11)	(156)	(31)
Industrial Packaging
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	429	469	1,284	1,388
Global Cellulose Fibers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	96	(59)	24	(123)
Printing Papers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	$ 106	$ 63	$ 262	$ 148