GOODWILL AND OTHER INTANGIBLES Changes in Goodwill Balances (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2020	Dec. 31, 2019
Goodwill [Line Items]
Beginning balance		$ 5,460
Accumulated impairment losses		(2,113)
Goodwill		3,304	$ 3,347
Currency translation and other (a)	[1]	(44)
Goodwill additions/reductions		1
Accumulated impairment loss additions / reductions		0
Accumulated impairment losses		(2,113)
Ending balance		5,417
Industrial Packaging
Goodwill [Line Items]
Beginning balance		3,410
Accumulated impairment losses		(296)
Goodwill		3,116	3,114
Currency translation and other (a)	[1]	1
Goodwill additions/reductions		1
Accumulated impairment loss additions / reductions		0
Accumulated impairment losses		(296)
Ending balance		3,412
Global Cellulose Fibers
Goodwill [Line Items]
Beginning balance		52
Accumulated impairment losses		(52)
Goodwill		0	0
Currency translation and other (a)	[1]	0
Goodwill additions/reductions		0
Accumulated impairment loss additions / reductions		0
Accumulated impairment losses		(52)
Ending balance		52
Printing Papers
Goodwill [Line Items]
Beginning balance		1,998
Accumulated impairment losses		(1,765)
Goodwill		188	$ 233
Currency translation and other (a)	[1]	(45)
Goodwill additions/reductions		0
Accumulated impairment loss additions / reductions		0
Accumulated impairment losses		(1,765)
Ending balance		$ 1,953

[1] Represents the effects of foreign currency translations