(Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Assets	$ 23,261	$ 23,940
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Assets	16,060	16,425
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Assets	3,369	3,625
Corporate and other | Corporate and Other
Segment Reporting Information [Line Items]
Assets	$ 3,832	$ 3,890