Financial Information By Industry Segment And Geographic Area (Information By Industry Segment, Capital Spending) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Capital Spending		$ 1,280	$ 1,241	$ 1,310
Subtotal
Segment Reporting Information [Line Items]
Capital Spending		1,259	1,221	1,232
Subtotal | Industrial Packaging
Segment Reporting Information [Line Items]
Capital Spending		836	832	871
Subtotal | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Capital Spending		188	174	129
Subtotal | Printing Papers
Segment Reporting Information [Line Items]
Capital Spending		235	215	232
Corporate and other (c)
Segment Reporting Information [Line Items]
Capital Spending	[1]	$ 21	$ 20	$ 78

[1] Includes corporate assets and assets of previously divested businesses of $0 million in 2017, $1 million in 2016 and $26 million in 2015.