REVENUE RECOGNITION Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 5,237	$ 4,593
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[1]	121	68
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales		(29)	(26)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		4,025	3,560
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		410	396
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		710	595
United States
Disaggregation of Revenue [Line Items]
Net sales	[1]	4,543	3,922
United States | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[1]	120	47
EMEA
Disaggregation of Revenue [Line Items]
Net sales	[1]	440	416
EMEA | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[1]	0	(1)
Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	[1]	29	60
Pacific Rim and Asia | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[1]	1	14
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	[1]	225	195
Americas, other than U.S. | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[1]	0	8
Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		4,406	3,930
Industrial Packaging | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	4,406	3,930
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales		4,406	3,930
Industrial Packaging | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales		(29)	(26)
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		4,025	3,560
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		410	396
Industrial Packaging | United States
Disaggregation of Revenue [Line Items]
Net sales	[1]	3,761	3,332
Industrial Packaging | EMEA
Disaggregation of Revenue [Line Items]
Net sales	[1]	410	393
Industrial Packaging | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	[1]	10	18
Industrial Packaging | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	[1]	225	187
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		710	595
Global Cellulose Fibers | Geography Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	710	595
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales		710	595
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		710	595
Global Cellulose Fibers | United States
Disaggregation of Revenue [Line Items]
Net sales	[1]	662	543
Global Cellulose Fibers | EMEA
Disaggregation of Revenue [Line Items]
Net sales	[1]	30	24
Global Cellulose Fibers | Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	[1]	18	28
Global Cellulose Fibers | Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 0	$ 0

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