Revenue Recognition Disaggregaton of Revenue Table (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Net sales	[1],[2]	$ 18,619	$ 18,916	$ 21,161
Corporate & Intersegment
Disaggregation of Revenue [Line Items]
Net sales	[1]	292	430	483
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	18,327	18,486	20,678
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[2]	292	430	483
Corporate and other
Disaggregation of Revenue [Line Items]
Net sales		(114)	(95)	(132)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		14,293	14,293	16,011
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		1,355	1,398	1,572
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		2,793	2,890	3,227
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	15,534	15,596	17,451
Industrial Packaging | Reportable Geographical Components [Member]
Disaggregation of Revenue [Line Items]
Net sales	[2]	15,534	15,596	17,451
Industrial Packaging | Corporate and other
Disaggregation of Revenue [Line Items]
Net sales		(114)	(95)	(132)
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		14,293	14,293	16,011
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales		1,355	1,398	1,572
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	2,793	2,890	3,227
Global Cellulose Fibers | Reportable Geographical Components [Member]
Disaggregation of Revenue [Line Items]
Net sales	[2]	2,793	2,890	3,227
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales		2,793	2,890	3,227
United States
Disaggregation of Revenue [Line Items]
Net sales	[1],[2],[3]	16,300	16,340	18,482
United States | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[2]	291	430	480
United States | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	[2]	13,386	13,340	14,970
United States | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	[2]	2,623	2,570	3,032
EMEA
Disaggregation of Revenue [Line Items]
Net sales	[1],[2]	1,432	1,494	1,693
EMEA | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[2]	0	0	0
EMEA | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	[2]	1,355	1,398	1,572
EMEA | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	[2]	77	96	121
Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	[2]	157	261	123
Pacific Rim and Asia | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[2]	1	0	3
Pacific Rim and Asia | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	[2]	63	37	46
Pacific Rim and Asia | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	[2]	93	224	74
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	[1],[2]	730	821	863
Americas, other than U.S. | Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[2]	0	0	0
Americas, other than U.S. | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	[2]	730	821	863
Americas, other than U.S. | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	[2]	$ 0	$ 0	$ 0

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

[2] Net sales are attributed to countries based on the location of the reportable segment making the sale.

[3] Export sales to unaffiliated customers were $2.9 billion in 2024, $2.7 billion in 2023 and $3.2 billion in 2022.