FINANCIAL INFORMATION BY BUSINESS SEGMENT AND GEOGRAPHIC AREA (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Segment Reporting [Line Items]
NET SALES	$ 645	$ 662	$ 1,827	$ 1,906
Cost of products sold and other	444	448	1,325	1,318
Maintenance outages	0	0	55	53
Economic downtime		0		3
Selling and administrative expenses, excluding Corporate Special Items	79	60	204	189
Depreciation, amortization and cost of timber harvested	36	41	105	110
Other Nonrecurring (Income) Expense	1	0	0	2
Operating Income (Loss)	87	113	138	235
Interest expense, net	11	7	30	24
Foreign exchange gain on intercompany note	1		(19)	0
Assets	2,951		2,951		$ 2,761
Payments to Acquire Productive Assets			156	142
Other Nonrecurring (Income) Expense, Net	4	1	8	3
Income Tax Expense (Benefit)	(14)	34	2	48
Net income from continuing operations	85	71	117	160
Latin America Segment [Member]
Segment Reporting [Line Items]
NET SALES	231	212	612	599
North America Segment [Member]
Segment Reporting [Line Items]
NET SALES	414	450	1,215	1,307
Operating Segments
Segment Reporting [Line Items]
NET SALES	645	662	1,827	1,906
Revenue from Contracts with Customers, including Intersegment Sales	672	678	1,879	1,941
Operating Segments | Latin America Segment [Member]
Segment Reporting [Line Items]
NET SALES	231	212	612	599
Cost of products sold and other	155	129	432	382
Maintenance outages	0	0	24	21
Economic downtime		0		0
Selling and administrative expenses, excluding Corporate Special Items	31	25	82	74
Depreciation, amortization and cost of timber harvested	23	25	68	66
Other Nonrecurring (Income) Expense	0	0	(1)	0
Operating Income (Loss)	22	33	5	56
Assets	1,277		1,277		1,231
Payments to Acquire Productive Assets			71	92
Revenue from Contracts with Customers, including Intersegment Sales	258	228	664	634
Operating Segments | North America Segment [Member]
Segment Reporting [Line Items]
NET SALES	414	450	1,215	1,307
Cost of products sold and other	289	319	893	936
Maintenance outages	0	0	31	32
Economic downtime		0		3
Selling and administrative expenses, excluding Corporate Special Items	48	35	122	115
Depreciation, amortization and cost of timber harvested	13	16	37	44
Other Nonrecurring (Income) Expense	1	0	1	2
Operating Income (Loss)	65	80	133	179
Assets	1,026		1,026		884
Payments to Acquire Productive Assets			85	49
Revenue from Contracts with Customers, including Intersegment Sales	414	450	1,215	1,307
Segment Reconciling Items
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	1	0	0	2
Interest expense, net	11	7	30	24
Segment Reconciling Items | Georgetown Mill Offtake Termination
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	1	0	1	2
Segment Reconciling Items | Brazil Environmental Reserve Adjustment
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	0	0	(1)	1
Segment Reconciling Items | Brazil Foreign Value-Added Tax Refund
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	0	0	0	(1)
Intersegment Eliminations [Member]
Segment Reporting [Line Items]
NET SALES	(27)	(16)	(52)	(35)
Intersegment Eliminations [Member] | Latin America Segment [Member]
Segment Reporting [Line Items]
NET SALES	(27)	(16)	(52)	(35)
Intersegment Eliminations [Member] | North America Segment [Member]
Segment Reporting [Line Items]
NET SALES	0	0	0	0
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	3	1	8	1
Assets	648		648		$ 646
Payments to Acquire Productive Assets			0	1
Segment Reporting, Reconciling Item, Corporate Nonsegment | Strategic Professional and Legal Fees
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	3	0	7	0
Segment Reporting, Reconciling Item, Corporate Nonsegment | Other Charges
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	0	0	1	0
Segment Reporting, Reconciling Item, Corporate Nonsegment | Employee Severance
Segment Reporting [Line Items]
Other Nonrecurring (Income) Expense	$ 0	$ 1	$ 0	$ 1