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, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings (loss) from continuing operations attributable to International Paper Company common shareholders	$ 951	$ 432	$ 1,822	$ 1,007
Weighted average common shares outstanding	357.8	388.8	366.8	391.0
Restricted performance share plan	2.6	3.8	3.9	4.3
Weighted average common shares outstanding – assuming dilution	360.4	392.6	370.7	395.3
Basic earnings (loss) per share from continuing operations	$ 2.66	$ 1.11	$ 4.97	$ 2.58
Diluted earnings (loss) per share from continuing operations	$ 2.64	$ 1.10	$ 4.92	$ 2.55