(Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets		$ 25,243	$ 31,718
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Assets		16,247	15,951
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Assets		3,521	3,444
Corporate and other | Corporate and Other
Segment Reporting Information [Line Items]
Assets	[1]	$ 5,475	$ 12,323

[1] Includes corporate assets and assets of divested businesses.