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Earnings Per Share Attributable To International Paper Company Common Shareholders (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share, Basic and Diluted [Abstract]  
Schedule Of Earnings Per Share, Basic and Diluted [Table Text Block]
A reconciliation of the amounts included in the computation of basic earnings (loss) per share from continuing operations, and diluted earnings (loss) per share from continuing operations is as follows: 

In millions, except per share amounts202120202019
Earnings (loss) from continuing operations attributable to International Paper common shareholders$1,122 $230 $699 
Weighted average common shares outstanding389.4 393.0 395.3 
Effect of dilutive securities:
Restricted performance share plan3.0 2.7 3.5 
Weighted average common shares outstanding  – assuming dilution392.4 395.7 398.8 
Basic earnings (loss) per share from continuing operations$2.88 $0.59 $1.77 
Diluted earnings (loss) per share from continuing operations$2.86 $0.58 $1.75