EARNINGS PER SHARE ATTRIBUTABLE TO INTERNATIONAL PAPER COMPANY COMMON SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings (loss) from continuing operations	$ 498	$ 222	$ 554	$ 394
Weighted average common shares outstanding	347.3	346.2	347.0	347.7
Restricted performance share plan	5.5	0.3	5.7	1.8
Weighted average common shares outstanding – assuming dilution	352.8	346.5	352.7	349.5
Basic earnings (loss) per share from continuing operations	$ 1.43	$ 0.64	$ 1.59	$ 1.13
Diluted earnings (loss) per share from continuing operations	$ 1.41	$ 0.64	$ 1.57	$ 1.12