REVENUE RECOGNITION Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 4,734	$ 4,682	$ 9,353	$ 9,702
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(25)	(17)	(51)	(49)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,628	3,550	7,114	7,274
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	328	351	676	742
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	717	698	1,421	1,509
Corporate and Other [Member] | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	86	100	193	226
United States
Disaggregation of Revenue [Line Items]
Net sales	4,154	4,021	8,150	8,332
United States | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	86	100	193	226
EMEA
Disaggregation of Revenue [Line Items]
Net sales	345	377	713	793
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	50	63	98	127
Pacific Rim and Asia | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	185	221	392	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	3,931	3,884	7,739	7,967
Industrial Packaging | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,931	3,884	7,739	7,967
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,931	3,884	7,739	7,967
Industrial Packaging | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(25)	(17)	(51)	(49)
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,628	3,550	7,114	7,274
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	328	351	676	742
Industrial Packaging | United States
Disaggregation of Revenue [Line Items]
Net sales	3,399	3,305	6,638	6,760
Industrial Packaging | EMEA
Disaggregation of Revenue [Line Items]
Net sales	328	351	676	742
Industrial Packaging | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	19	7	33	15
Industrial Packaging | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	185	221	392	450
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	717	698	1,421	1,509
Global Cellulose Fibers | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	717	698	1,421	1,509
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	717	698	1,421	1,509
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	717	698	1,421	1,509
Global Cellulose Fibers | United States
Disaggregation of Revenue [Line Items]
Net sales	669	616	1,319	1,346
Global Cellulose Fibers | EMEA
Disaggregation of Revenue [Line Items]
Net sales	17	26	37	51
Global Cellulose Fibers | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	31	56	65	112
Global Cellulose Fibers | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate and Other [Member] | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	$ 86	$ 100	$ 193	$ 226