INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Examination [Line Items]
Income tax provision	$ 33	$ 38	$ 98	$ 97
Effective income tax rate reconciliation, percent	36.00%	26.00%	33.00%	28.00%
Income tax examination, estimate of possible loss			$ 120
Income tax examination, penalties and interest expense			$ 418
Income tax examination, tax liabilities payable, percentage	40.00%		40.00%
Income tax examination, tax liability, threshold	$ 300		$ 300
Income Tax Liability, Threshold Over Which International Paper Will Pay All Amounts of Assessment	$ 300		$ 300
International Paper
Income Tax Examination [Line Items]
Income tax examination, tax liabilities payable, percentage	60.00%		60.00%