EARNINGS PER SHARE ATTRIBUTABLE TO INTERNATIONAL PAPER COMPANY COMMON SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2025		Mar. 31, 2024
Net earnings (loss)	$ (105)		$ 56
Weighted average common shares outstanding	437,600		346,700
Restricted performance share plan	0	[1]	1,800
Weighted average common shares outstanding – assuming dilution	437,600		348,500
Basic earnings (loss) per share	$ (0.24)		$ 0.16
Diluted earnings (loss) per share	$ (0.24)		$ 0.16
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6,100

[1] (a) 6.1 million of securities were anti-dilutive for the three months ended March 31, 2025 and were not included in the table