REVENUE RECOGNITION Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 4,686	$ 4,613	$ 14,039	$ 14,315
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(36)	(20)	(87)	(69)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,640	3,491	10,754	10,765
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	322	316	998	1,058
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	710	725	2,131	2,234
Corporate Segment and Other Operating Segment [Member] | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	50	101	243	327
United States
Disaggregation of Revenue [Line Items]
Net sales	4,153	4,028	12,303	12,360
United States | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	49	101	242	327
EMEA
Disaggregation of Revenue [Line Items]
Net sales	343	342	1,056	1,135
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	32	62	130	189
Pacific Rim and Asia | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	1	0	1	0
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	158	181	550	631
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	3,926	3,787	11,665	11,754
Industrial Packaging | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,926	3,787	11,665	11,754
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,926	3,787	11,665	11,754
Industrial Packaging | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(36)	(20)	(87)	(69)
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	3,640	3,491	10,754	10,765
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	322	316	998	1,058
Industrial Packaging | United States
Disaggregation of Revenue [Line Items]
Net sales	3,429	3,281	10,067	10,041
Industrial Packaging | EMEA
Disaggregation of Revenue [Line Items]
Net sales	322	316	998	1,058
Industrial Packaging | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	17	9	50	24
Industrial Packaging | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	158	181	550	631
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	710	725	2,131	2,234
Global Cellulose Fibers | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	710	725	2,131	2,234
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	710	725	2,131	2,234
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	710	725	2,131	2,234
Global Cellulose Fibers | United States
Disaggregation of Revenue [Line Items]
Net sales	675	646	1,994	1,992
Global Cellulose Fibers | EMEA
Disaggregation of Revenue [Line Items]
Net sales	21	26	58	77
Global Cellulose Fibers | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	14	53	79	165
Global Cellulose Fibers | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate Segment and Other Operating Segment [Member] | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	$ 50	$ 101	$ 243	$ 327