Financial Information By Industry Segment And Geographic Area (Sales By Industry Segment) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
NET SALES		$ 5,951	$ 5,901	$ 5,833	$ 5,621	$ 5,711	$ 5,517	$ 5,383	$ 5,132	$ 23,306	[1]	$ 21,743	[1]	$ 19,495	[1]
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
NET SALES										15,900		15,077		14,226
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
NET SALES										2,819		2,551		1,092
Operating Segments [Member] | Printing Papers
Segment Reporting Information [Line Items]
NET SALES										4,375		4,157		4,058
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
NET SALES	[2]									$ 212		$ (42)		$ 119

[1] Net sales are attributed to countries based on the location of the seller.

[2] Includes sales of $0 million in 2018, $15 million in 2017 and $42 million in 2016, operating profits (losses) of $0 million in 2018, $0 million in 2017 and $(2) million in 2016, and corporate special items expense of $0 million in 2018, $9 million in 2017 and $9 million in 2016, from previously divested businesses.