INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Examination [Line Items]
Valuation allowance	$ 52	$ 35
Tax credits	34	25
Unrecognized tax benefits	16	$ 12	$ 10
Income tax examination, estimate of possible loss	106
Income tax examination, penalties and interest expense	$ 289
Income tax examination, tax liabilities payable, percentage	40.00%
Income tax examination, tax liability, threshold	$ 300
Secretariat of the Federal Revenue Bureau of Brazil
Income Tax Examination [Line Items]
Net operating loss carryforwards	28
FINLAND
Income Tax Examination [Line Items]
Net operating loss carryforwards	30
FRANCE
Income Tax Examination [Line Items]
Net operating loss carryforwards	54
LUXEMBOURG
Income Tax Examination [Line Items]
Net operating loss carryforwards	1
UNITED KINGDOM
Income Tax Examination [Line Items]
Tax Credit Carryforward, Amount	5
Net operating loss carryforwards	53
United States
Income Tax Examination [Line Items]
Tax Credits, Purchased	20
Tax Credits, Used	15
Tax Credit Carryforward, Amount	5
State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax Credit Carryforward, Amount	$ 24
International Paper
Income Tax Examination [Line Items]
Income tax examination, tax liabilities payable, percentage	60.00%