INDUSTRY SEGMENT INFORMATION Sales 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 Information [Line Items]
Net sales	[1]	$ 5,714	$ 5,123	$ 16,693	$ 15,341
Consolidation, Eliminations
Segment Reporting Information [Line Items]
Net sales	[1]	52	48	143	150
Industrial Packaging
Segment Reporting Information [Line Items]
Net sales		4,087	3,768	12,096	11,220
Global Cellulose Fibers
Segment Reporting Information [Line Items]
Net sales		729	564	1,981	1,737
Printing Papers
Segment Reporting Information [Line Items]
Net sales		$ 846	$ 743	$ 2,473	$ 2,234

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