FINANCIAL INFORMATION BY BUSINESS SEGMENT AND GEOGRAPHIC AREA - Schedule of Segment Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments	3
Revenue from Contracts with Customers, including Intersegment Sales	$ 3,399	$ 3,804	$ 3,778
NET SALES	3,351	3,773	3,721
Cost of products sold and other	2,526	2,749	2,620
Maintenance outages	110	73	89
Economic downtime	6	37	123
Selling and administrative expenses, excluding Corporate Special Items	281	310	329
Depreciation, amortization and cost of timber harvested	179	159	143
Other special items, net (a)	13	8	24
Business Segment Operating Profit	251	453	441
Income (loss) before income taxes	199	405	369
Interest expense (income), net	39	39	34
Assets	2,763	2,604
Payments to Acquire Productive Assets	224	221	210
Goodwill and Intangible Asset Impairment	11	0	0
Europe
Segment Reporting Information [Line Items]
NET SALES	739	799	821
Latin America
Segment Reporting Information [Line Items]
NET SALES	858	945	949
North America
Segment Reporting Information [Line Items]
NET SALES	1,754	2,029	1,951
Operating Segments
Segment Reporting Information [Line Items]
Business Segment Operating Profit	251	453	441
Operating Segments | Europe
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	741	801	821
NET SALES	739	799	821
Cost of products sold and other	720	694	704
Maintenance outages	40	1	27
Economic downtime	3	10	38
Selling and administrative expenses, excluding Corporate Special Items	54	52	68
Depreciation, amortization and cost of timber harvested	34	33	28
Other special items, net (a)	11
Business Segment Operating Profit	(112)	10	(25)
Assets	500	324
Payments to Acquire Productive Assets	36	27	31
Goodwill and Intangible Asset Impairment	11
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	904	974	1,006
NET SALES	858	945	949
Cost of products sold and other	555	617	574
Maintenance outages	21	18	9
Economic downtime	0	0	0
Selling and administrative expenses, excluding Corporate Special Items	95	91	98
Depreciation, amortization and cost of timber harvested	87	75	68
Other special items, net (a)	0
Business Segment Operating Profit	100	150	197
Assets	1,231	1,065
Payments to Acquire Productive Assets	116	140	112
Impairment of goodwill	0
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue from Contracts with Customers, including Intersegment Sales	1,754	2,029	1,951
NET SALES	1,754	2,029	1,951
Cost of products sold and other	1,251	1,438	1,342
Maintenance outages	49	54	53
Economic downtime	3	27	85
Selling and administrative expenses, excluding Corporate Special Items	132	167	163
Depreciation, amortization and cost of timber harvested	58	51	47
Other special items, net (a)	2
Business Segment Operating Profit	263	293	269
Assets	884	904
Payments to Acquire Productive Assets	71	$ 53	$ 63
Impairment of goodwill	$ 0
Operating Segments | North America | Customer Concentration Risk | Revenue, Segment Benchmark
Segment Reporting Information [Line Items]
Concentration risk, percentage	15.00%	13.00%	14.00%
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting Information [Line Items]
Other special items, net (a)	$ 13	$ 8	$ 24
Interest expense (income), net	39	39	34
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Europe
Segment Reporting Information [Line Items]
Other special items, net (a)		1	19
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Latin America
Segment Reporting Information [Line Items]
Other special items, net (a)		6	(3)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | North America
Segment Reporting Information [Line Items]
Other special items, net (a)		1	8
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting Information [Line Items]
Other special items, net (a)	1	1	14
Assets	148	311
Payments to Acquire Productive Assets	1	1	4
Reportable Geographical Components | United States
Segment Reporting Information [Line Items]
NET SALES	1,754	2,029	1,951
Reportable Geographical Components | Brazil
Segment Reporting Information [Line Items]
NET SALES	904	971	995
Reportable Geographical Components | Europe
Segment Reporting Information [Line Items]
NET SALES	741	801	821
Reportable Geographical Components | Americas, other than United States and Brazil
Segment Reporting Information [Line Items]
NET SALES	0	3	11
Intersegment Eliminations
Segment Reporting Information [Line Items]
NET SALES	(48)	(31)	(57)
Other special items, net (a)	(1)
Intersegment Eliminations | Europe
Segment Reporting Information [Line Items]
NET SALES	(2)	(2)	0
Intersegment Eliminations | Latin America
Segment Reporting Information [Line Items]
NET SALES	(46)	(29)	(57)
Intersegment Eliminations | North America
Segment Reporting Information [Line Items]
NET SALES	$ 0	$ 0	$ 0