Revenue Recognition Disaggregaton of Revenue Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 22,376	[1]	$ 23,306	[2]
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	208	[1]	212	[2]
Subsegments Consolidation Items [Domain]
Disaggregation of Revenue [Line Items]
Net sales	(160)		(246)
North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	13,509		14,187
EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	1,335		1,355
Brazilian Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	235		232
European Coated Paperboard
Disaggregation of Revenue [Line Items]
Net sales	365		359
Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	2,551		2,819
North American Printing Papers
Disaggregation of Revenue [Line Items]
Net sales	1,956		1,956
Brazilian Papers
Disaggregation of Revenue [Line Items]
Net sales	967		978
European Papers
Disaggregation of Revenue [Line Items]
Net sales	1,250		1,252
Indian Papers
Disaggregation of Revenue [Line Items]
Net sales	160		202
Industrial Packaging | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	15,326		15,900
Industrial Packaging | Subsegments Consolidation Items [Domain]
Disaggregation of Revenue [Line Items]
Net sales	(118)		(233)
Industrial Packaging | Reportable Geographical Components [Member]
Disaggregation of Revenue [Line Items]
Net sales	15,326	[1]	15,900	[2]
Industrial Packaging | North American Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	13,509		14,187
Industrial Packaging | EMEA Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	1,335		1,355
Industrial Packaging | Brazilian Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	235		232
Industrial Packaging | European Coated Paperboard
Disaggregation of Revenue [Line Items]
Net sales	365		359
Global Cellulose Fibers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,551		2,819
Global Cellulose Fibers | Reportable Geographical Components [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,551	[1]	2,819	[2]
Global Cellulose Fibers | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	2,551		2,819
Printing Papers | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,291		4,375
Printing Papers | Subsegments Consolidation Items [Domain]
Disaggregation of Revenue [Line Items]
Net sales	(42)		(13)
Printing Papers | Reportable Geographical Components [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,291	[1]	4,375	[2]
Printing Papers | North American Printing Papers
Disaggregation of Revenue [Line Items]
Net sales	1,956		1,956
Printing Papers | Brazilian Papers
Disaggregation of Revenue [Line Items]
Net sales	967		978
Printing Papers | European Papers
Disaggregation of Revenue [Line Items]
Net sales	1,250		1,252
Printing Papers | Indian Papers
Disaggregation of Revenue [Line Items]
Net sales	160		202
United States
Disaggregation of Revenue [Line Items]
Net sales	16,948	[1]	17,609	[2]
United States | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	220	[1]	203	[2]
United States | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	12,668	[1]	13,167	[2]
United States | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	2,148	[1]	2,336	[2]
United States | Printing Papers
Disaggregation of Revenue [Line Items]
Net sales	1,912	[1]	1,903	[2]
EMEA
Disaggregation of Revenue [Line Items]
Net sales	3,258	[1]	3,321	[2]
EMEA | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(11)	[1]	(17)	[2]
EMEA | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	1,692	[1]	1,704	[2]
EMEA | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	254	[1]	304	[2]
EMEA | Printing Papers
Disaggregation of Revenue [Line Items]
Net sales	1,323	[1]	1,330	[2]
Pacific Rim and Asia
Disaggregation of Revenue [Line Items]
Net sales	415	[1]	605	[2]
Pacific Rim and Asia | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	12	[1]	39	[2]
Pacific Rim and Asia | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	65	[1]	142	[2]
Pacific Rim and Asia | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	149	[1]	179	[2]
Pacific Rim and Asia | Printing Papers
Disaggregation of Revenue [Line Items]
Net sales	189	[1]	245	[2]
Americas, other than U.S.
Disaggregation of Revenue [Line Items]
Net sales	1,755	[1]	1,771	[2]
Americas, other than U.S. | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(13)	[1]	(13)	[2]
Americas, other than U.S. | Industrial Packaging
Disaggregation of Revenue [Line Items]
Net sales	901	[1]	887	[2]
Americas, other than U.S. | Global Cellulose Fibers
Disaggregation of Revenue [Line Items]
Net sales	0	[1]	0	[2]
Americas, other than U.S. | Printing Papers
Disaggregation of Revenue [Line Items]
Net sales	$ 867	[1]	$ 897	[2]

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

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