EARNINGS PER SHARE ATTRIBUTABLE TO INTERNATIONAL PAPER COMPANY COMMON SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Weighted average common shares outstanding	375.2	392.8
Restricted performance share plan	4.0	2.0
Weighted average common shares outstanding – assuming dilution	379.2	394.8
Earnings (loss) from continuing operations attributable to International Paper Company common shareholders	$ 360	$ 267
Basic earnings (loss) per share from continuing operations	$ 0.96	$ 0.68
Diluted earnings (loss) per share from continuing operations	$ 0.95	$ 0.68

Amount after tax of income (loss) from continuing operations attributable to the parent.

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