INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Examination [Line Items]
Income tax provision	$ 21	$ 33	$ 65	$ 59
Effective income tax rate reconciliation, percent	30.00%	28.00%	31.00%	30.00%
Income tax examination, estimate of possible loss			$ 121
Income tax examination, penalties and interest expense			$ 414
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%