(Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Assets	$ 23,940	$ 25,243
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Assets	16,425	16,247
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Assets	3,625	3,521
Corporate and other | Corporate and Other
Segment Reporting Information [Line Items]
Assets	$ 3,890	$ 5,475