(Information By Industry Segment, External Sales By Major Product) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales	[1],[2]	$ 18,619	$ 18,916	$ 21,161
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	[1]	18,327	18,486	20,678
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Net sales	[1]	15,534	15,596	17,451
Operating Segments [Member] | Industrial Packaging | External Customers
Segment Reporting Information [Line Items]
Net sales		15,533	15,596	17,441
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Net sales	[1]	2,793	2,890	3,227
Operating Segments [Member] | Global Cellulose Fibers | External Customers
Segment Reporting Information [Line Items]
Net sales		2,784	2,883	3,219
Corporate and other
Segment Reporting Information [Line Items]
Net sales		(114)	(95)	(132)
Corporate and other | Industrial Packaging
Segment Reporting Information [Line Items]
Net sales		(114)	(95)	(132)
Corporate and other | Corporate Segment and Other Operating Segment | External Customers
Segment Reporting Information [Line Items]
Net sales		$ 302	$ 437	$ 501

[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.