Financial Information By Industry Segment And Geographic Area (Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Assets		$ 33,903	$ 33,093
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Assets		15,354	14,707
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Assets		3,913	3,845
Operating Segments [Member] | Printing Papers
Segment Reporting Information [Line Items]
Assets		4,054	3,965
Corporate and other (c) | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 10,582	$ 10,576

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