REVENUE RECOGNITION Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 4,682	[1]	$ 5,389	[1]	$ 9,702	$ 10,626
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	100		110		226	231
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(17)		(48)		(49)	(77)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,550		4,126		7,274	8,151
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	351		413		742	823
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	698		788		1,509	1,498
United States
Disaggregation of Revenue [Line Items]
Net sales	4,021		4,703		8,332	9,246
United States | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	100		109		226	229
EMEA
Disaggregation of Revenue [Line Items]
Net sales	377		438		793	878
EMEA | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	0		0		0	0
Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	63		23		127	52
Pacific Rim and Asia | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	0		1		0	2
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	221		225		450	450
Americas, other than U.S. | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	0		0		0	0
Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,884		4,491		7,967	8,897
Industrial Packaging | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,884		4,491		7,967	8,897
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,884		4,491		7,967	8,897
Industrial Packaging | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(17)		(48)		(49)	(77)
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,550		4,126		7,274	8,151
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	351		413		742	823
Industrial Packaging | United States
Disaggregation of Revenue [Line Items]
Net sales	3,305		3,842		6,760	7,603
Industrial Packaging | EMEA
Disaggregation of Revenue [Line Items]
Net sales	351		413		742	823
Industrial Packaging | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	7		11		15	21
Industrial Packaging | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	221		225		450	450
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	698		788		1,509	1,498
Global Cellulose Fibers | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	698		788		1,509	1,498
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	698		788		1,509	1,498
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	698		788		1,509	1,498
Global Cellulose Fibers | United States
Disaggregation of Revenue [Line Items]
Net sales	616		752		1,346	1,414
Global Cellulose Fibers | EMEA
Disaggregation of Revenue [Line Items]
Net sales	26		25		51	55
Global Cellulose Fibers | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	56		11		112	29
Global Cellulose Fibers | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	$ 0		$ 0		$ 0	$ 0

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