REVENUE RECOGNITION Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 5,389	$ 4,770	$ 10,626	$ 9,363
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales		110	60	231	128
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales		(48)	(27)	(77)	(53)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		4,126	3,663	8,151	7,223
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		413	394	823	790
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		788	680	1,498	1,275
United States
Disaggregation of Revenue [Line Items]
Net sales		4,703	4,106	9,246	8,028
United States | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales		109	43	229	90
EMEA
Disaggregation of Revenue [Line Items]
Net sales		438	416	878	832
EMEA | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales		0	(1)	0	(2)
Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales		23	49	52	109
Pacific Rim and Asia | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales		1	10	2	24
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales		225	199	450	394
Americas, other than U.S. | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales		0	8	0	16
Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		4,491	4,030	8,897	7,960
Industrial Packaging | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales		4,491	4,030	8,897	7,960
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales		4,491	4,030	8,897	7,960
Industrial Packaging | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales		(48)	(27)	(77)	(53)
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		4,126	3,663	8,151	7,223
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		413	394	823	790
Industrial Packaging | United States
Disaggregation of Revenue [Line Items]
Net sales		3,842	3,430	7,603	6,762
Industrial Packaging | EMEA
Disaggregation of Revenue [Line Items]
Net sales		413	395	823	788
Industrial Packaging | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales		11	14	21	32
Industrial Packaging | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales		225	191	450	378
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		788	680	1,498	1,275
Global Cellulose Fibers | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales		788	680	1,498	1,275
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales		788	680	1,498	1,275
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		788	680	1,498	1,275
Global Cellulose Fibers | United States
Disaggregation of Revenue [Line Items]
Net sales		752	633	1,414	1,176
Global Cellulose Fibers | EMEA
Disaggregation of Revenue [Line Items]
Net sales		25	22	55	46
Global Cellulose Fibers | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales		11	25	29	53
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.