Financial Information By Industry Segment And Geographic Area (Information By Industry Segment, Restructuring And Other Charges) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Restructuring and other charges, net		$ 29	$ 67	$ 54
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Restructuring and other charges, net		47	0	7
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Restructuring and other charges, net		0	0	0
Operating Segments [Member] | Printing Papers
Segment Reporting Information [Line Items]
Restructuring and other charges, net		3	0	0
Corporate and other | Corporate Segment [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges, net	[1]	$ (21)	$ 67	$ 47

[1] Includes corporate expenses and expenses of $0 million in 2018, $9 million in 2017 and $9 million in 2016, from previously divested businesses.