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EARNINGS PER SHARE ATTRIBUTABLE TO INTERNATIONAL PAPER COMPANY COMMON SHAREHOLDERS (Tables)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
A reconciliation of the amounts included in the computation of earnings (loss) per common share, and diluted earnings (loss) per common share is as follows: 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
In millions, except per share amounts
2017
 
2016
 
2017
 
2016
Earnings (loss) from continuing operations
$
395

 
$
312

 
$
684

 
$
691

Effect of dilutive securities
—

 
—

 
—

 
—

Earnings (loss) from continuing operations – assuming dilution
$
395

 
$
312

 
$
684

 
$
691

Average common shares outstanding
412.9

 
411.2

 
412.6

 
411.0

Effect of dilutive securities
 
 
 
 
 
 
 
Restricted stock performance share plan
4.5

 
4.1

 
4.8

 
4.5

Average common shares outstanding – assuming dilution
417.4

 
415.3

 
417.4

 
415.5

Basic earnings (loss) from continuing operations per common share
$
0.96

 
$
0.76

 
$
1.65

 
$
1.68

Diluted earnings (loss) from continuing operations per common share
$
0.95

 
$
0.75

 
$
1.64

 
$
1.66