FINANCIAL INFORMATION BY BUSINESS SEGMENT AND GEOGRAPHIC AREA (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	$ 862	$ 973	$ 2,496	$ 2,830
NET SALES	846	965	2,461	2,803
Cost of products sold and other	630	689	1,847	2,039
Maintenance outages	0	1	93	55
Economic downtime	2	16	5	27
Selling and administrative expenses, excluding Corporate Special Items	67	74	212	229
Depreciation, amortization and cost of timber harvested	49	39	134	115
Other Nonrecurring (Income) Expense	0	4	2	6
Business Segment Operating Profit (Loss)	98	150	172	344
Income before income taxes	88	132	141	305
Interest (income) expense, net	9	14	28	32
Total Assets	2,703		2,703		$ 2,604
Payments to Acquire Productive Assets			168	157
Europe Segment [Member]
Segment Reporting Information [Line Items]
NET SALES	184	193	555	605
Latin America Segment [Member]
Segment Reporting Information [Line Items]
NET SALES	212	240	599	683
North America Segment [Member]
Segment Reporting Information [Line Items]
NET SALES	450	532	1,307	1,515
Operating Segments
Segment Reporting Information [Line Items]
Business Segment Operating Profit (Loss)	(21)	35
Operating Segments | Europe Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	184	194	555	607
NET SALES	184	193	555	605
Cost of products sold and other	181	165	528	527
Maintenance outages	0	1	40	1
Economic downtime	2	5	2	8
Selling and administrative expenses, excluding Corporate Special Items	13	11	43	39
Depreciation, amortization and cost of timber harvested	9	8	25	24
Other Nonrecurring (Income) Expense	0	0	0	1
Business Segment Operating Profit (Loss)	(21)	3	(83)	7
Total Assets	402		402		324
Payments to Acquire Productive Assets			26	17
Operating Segments | Latin America Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	228	247	634	708
NET SALES	212	240	599	683
Cost of products sold and other	130	154	383	449
Maintenance outages	0	0	21	18
Economic downtime	0	0	0	0
Selling and administrative expenses, excluding Corporate Special Items	23	22	67	66
Depreciation, amortization and cost of timber harvested	24	18	65	53
Other Nonrecurring (Income) Expense	0	3	0	3
Business Segment Operating Profit (Loss)	35	49	63	100
Total Assets	1,200		1,200		1,065
Payments to Acquire Productive Assets			92	102
Operating Segments | North America Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	450	532	1,307	1,515
NET SALES	450	532	1,307	1,515
Cost of products sold and other	319	370	936	1,063
Maintenance outages	0	0	32	36
Economic downtime	0	11	3	19
Selling and administrative expenses, excluding Corporate Special Items	31	41	102	124
Depreciation, amortization and cost of timber harvested	16	13	44	38
Other Nonrecurring (Income) Expense	0	1	2	2
Business Segment Operating Profit (Loss)	84	98	192	237
Total Assets	887		887		904
Payments to Acquire Productive Assets			49	37
Segment Reconciling Items
Segment Reporting Information [Line Items]
Other special items, net	0	4	2	6
Less:
Segment Reporting Information [Line Items]
NET SALES	(16)	(8)	(35)	(27)
Less: | Europe Segment [Member]
Segment Reporting Information [Line Items]
NET SALES	0	(1)	0	(2)
Less: | Latin America Segment [Member]
Segment Reporting Information [Line Items]
NET SALES	(16)	(7)	(35)	(25)
Less: | North America Segment [Member]
Segment Reporting Information [Line Items]
NET SALES	0	0	0	0
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting Information [Line Items]
Other Nonrecurring (Income) Expense	1	$ 0	1	1
Total Assets	$ 214		214		$ 311
Payments to Acquire Productive Assets			$ 1	$ 1