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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings (loss) from continuing operations	$ 192	$ 887	$ 586	$ 1,570
Weighted average common shares outstanding	346.0	357.8	347.2	366.8
Restricted performance share plan	2.1	2.6	1.8	3.9
Weighted average common shares outstanding – assuming dilution	348.1	360.4	349.0	370.7
Basic earnings (loss) per share from continuing operations	$ 0.55	$ 2.48	$ 1.69	$ 4.28
Diluted earnings (loss) per share from continuing operations	$ 0.55	$ 2.46	$ 1.68	$ 4.24