INDUSTRY SEGMENT INFORMATION Sales 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 Information [Line Items]
Net sales	[1]	$ 5,616	$ 4,866	$ 10,979	$ 10,218
Consolidation, Eliminations
Segment Reporting Information [Line Items]
Net sales	[1]	43	45	91	102
Industrial Packaging
Segment Reporting Information [Line Items]
Net sales		4,056	3,633	8,009	7,452
Global Cellulose Fibers
Segment Reporting Information [Line Items]
Net sales		671	605	1,252	1,173
Printing Papers
Segment Reporting Information [Line Items]
Net sales		$ 846	$ 583	$ 1,627	$ 1,491

[1] Net sales are attributed to countries based on the location of the seller.