(Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Assets	$ 22,800	$ 23,261
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Assets	15,805	16,060
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Assets	2,857	3,369
Corporate and other | Corporate Segment and Other Operating Segment
Segment Reporting Information [Line Items]
Assets	$ 4,138	$ 3,832