(Changes In Goodwill Balances) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 3,347	$ 3,374
Currency translation and other (a)	[1]	(28)	(6)
Goodwill additions/reductions		(4)	(81)
Accumulated impairment loss additions/reductions			(60)
Goodwill		5,428	5,460		$ 5,547
Accumulated impairment losses		(2,113)	(2,113)		(2,173)
Goodwill, ending balance		3,315	3,347
Industrial Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance		3,114	3,083
Currency translation and other (a)	[1]	5	0
Goodwill additions/reductions	[2],[3]	(5)	31
Accumulated impairment loss additions/reductions			0
Goodwill		3,410	3,410		3,379
Accumulated impairment losses		(296)	(296)		(296)
Goodwill, ending balance		3,114	3,114
Global Cellulose Fibers
Goodwill [Roll Forward]
Goodwill, beginning balance		0	52
Currency translation and other (a)	[1]	0	0
Goodwill additions/reductions		0	0
Accumulated impairment loss additions/reductions	[4]		(52)
Goodwill		52	52		52
Accumulated impairment losses		(52)	(52)		0
Goodwill, ending balance		0	0
Printing Papers
Goodwill [Roll Forward]
Goodwill, beginning balance		233	239
Currency translation and other (a)	[1]	(33)	(6)
Goodwill additions/reductions		1	(112)	[5]
Accumulated impairment loss additions/reductions	[5]		(112)
Goodwill		1,966	1,998		2,116
Accumulated impairment losses		(1,765)	(1,765)		$ (1,877)
Goodwill, ending balance		$ 201	$ 233

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

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

[3] Reflects the goodwill for the acquisitions and divestitures of Industrial Packaging box plants in EMEA.

[4] Reflects the impairment of the Global Cellulose Fibers reporting unit.

[5] Reflects the reclassification of India goodwill and related impairment losses to held for sale prior to the sale of the business.