Goodwill And Other Intangibles (Changes In Goodwill Balances) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 3,364		$ 3,335
Reclassifications and other (b)	[1]	11		29
Additions/reductions		36		0
Impairment loss		0		0
Goodwill gross		5,584		5,537		$ 5,508
Accumulated impairment losses		(2,173)		(2,173)		(2,173)
Goodwill, ending balance		3,411		3,364
Industrial Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance		3,079		3,088
Reclassifications and other (b)	[1]	3		(4)
Additions/reductions		4	[2]	(5)	[3]
Impairment loss		0		0
Goodwill gross		3,382		3,375		3,384
Accumulated impairment losses		(296)		(296)		(296)
Goodwill, ending balance		3,086		3,079
Global Cellulose Fibers
Goodwill [Roll Forward]
Goodwill, beginning balance		19		0
Reclassifications and other (b)	[1]	0		0
Additions/reductions	[4]	33		19
Impairment loss		0		0
Goodwill gross		52		19		0
Accumulated impairment losses		0		0		0
Goodwill, ending balance		52		19
Printing Papers
Goodwill [Roll Forward]
Goodwill, beginning balance		266		247
Reclassifications and other (b)	[1]	8		33
Additions/reductions	[5]	(1)		(14)
Impairment loss		0		0
Goodwill gross		2,150		2,143		2,124
Accumulated impairment losses		(1,877)		(1,877)		$ (1,877)
Goodwill, ending balance		$ 273		$ 266

[1] Represents the effects of foreign currency translations and reclassifications.

[2] Reflects the acquisition of the newly acquired Moroccan box plant.

[3] Reflects a reduction from tax benefits generated by the deduction of goodwill amortization for tax purposes in the U.S.

[4] Reflects the acquisition and purchase price adjustments of the newly acquired pulp business.

[5] Reflects a reduction from tax benefits generated by the deduction of goodwill amortization for tax purposes in Brazil.