INCOME TAXES (Note)	9 Months Ended
INCOME TAXES (Note)	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes [Note Text Block]	International Paper made income tax payments, net of refunds, of $203 million and $245 million for the nine months ended September 30, 2020 and 2019, respectively. The Company currently estimates, that as a result of ongoing discussions, pending tax settlements and expirations of statutes of limitations, the amount of unrecognized tax benefits could be reduced by approximately $70 million during the next 12 months. The Brazilian Federal Revenue Service has challenged the deductibility of goodwill amortization generated in a 2007 acquisition by International Paper do Brasil Ltda., a wholly-owned subsidiary of the Company. The Company received assessments for the tax years 2007-2015 totaling approximately $107 million in tax, and $342 million in interest, penalties, and fees as of September 30, 2020 (adjusted for variation in currency exchange rates). After a previous favorable ruling challenging the basis for these assessments, we received other subsequent unfavorable decisions from the Brazilian Administrative Council of Tax Appeals. The Company has appealed and intends to further appeal these and any future unfavorable administrative judgments to the Brazilian federal courts; however, this tax litigation matter may take many years to resolve. The Company believes that it has appropriately evaluated the transaction underlying these assessments, and has concluded based on Brazilian tax law, that its position would be sustained. The Company intends to vigorously defend its position against the current assessments and any similar assessments that may be issued for tax years subsequent to 2015. On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security (CARES) Act ("the CARES Act"). The CARES Act provides various types of economic relief for individuals and businesses due to the COVID-19 pandemic, including temporary corporate tax relief. We currently do not believe there to be a material impact to the income tax provision resulting from the CARES Act.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.