EARNINGS PER SHARE ATTRIBUTABLE TO INTERNATIONAL PAPER COMPANY COMMON SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings (loss) from continuing operations	$ 150	$ 192	$ 704	$ 586
Weighted average common shares outstanding	347.4	346.0	347.1	347.2
Restricted performance share plan	6.0	2.1	6.5	1.8
Weighted average common shares outstanding – assuming dilution	353.4	348.1	353.6	349.0
Basic earnings (loss) per share from continuing operations	$ 0.43	$ 0.55	$ 2.02	$ 1.69
Diluted earnings (loss) per share from continuing operations	$ 0.42	$ 0.55	$ 1.99	$ 1.68