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EARNINGS PER SHARE ATTRIBUTABLE TO INTERNATIONAL PAPER COMPANY COMMON SHAREHOLDERS Footnote
9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Earnings Per Share [Note Text Block]
Basic earnings per share is computed by dividing earnings by the weighted average number of common shares outstanding. Diluted earnings per share is computed assuming that all potentially dilutive securities were converted into common shares. There are no adjustments required to be made to net income for purposes of computing basic and diluted earnings per share. 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: 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
In millions, except per share amounts
2019
 
2018
 
2019
 
2018
Earnings (loss) from continuing operations attributable to International Paper Company common shareholders
$
344

 
$
562

 
$
1,060

 
$
1,351

Weighted average common shares outstanding
392.6

 
407.4

 
396.3

 
411.4

Effect of dilutive securities
 
 
 
 
 
 
 
Restricted performance share plan
2.8

 
4.0

 
3.3

 
4.9

Weighted average common shares outstanding – assuming dilution
395.4

 
411.4

 
399.6

 
416.3

Basic earnings (loss) per share from continuing operations
$
0.88

 
$
1.38

 
$
2.67

 
$
3.28

Diluted earnings (loss) per share from continuing operations
$
0.87

 
$
1.37

 
$
2.65

 
$
3.25