Financial Information By Industry Segment And Geographic Area (Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Assets		$ 33,576	$ 33,903
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Assets		15,859	15,354
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Assets		3,880	3,913
Operating Segments [Member] | Printing Papers
Segment Reporting Information [Line Items]
Assets		3,905	4,054
Corporate and other | Corporate and Other
Segment Reporting Information [Line Items]
Assets	[1]	$ 9,932	$ 10,582

[1] Includes corporate assets, assets of businesses held for sale and assets of previously divested businesses.