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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Schedule of earnings per share
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
In millions, except per share data
2018
 
2017
 
2018
 
2017
Net Income Attributable to Graphic Packaging Holding Company
$
49.4

 
$
42.0

 
$
79.3

 
$
79.0

Weighted Average Shares:
 
 
 
 
 
 
 
Basic
310.7


310.7


310.6


311.8

Dilutive Effect of RSUs
0.6

 
0.4

 
0.7

 
0.7

Diluted
311.3


311.1


311.3


312.5

Income Per Share — Basic
$
0.16

 
$
0.14

 
$
0.26

 
$
0.25

 Income Per Share — Diluted
$
0.16

 
$
0.14

 
$
0.25

 
$
0.25