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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2016
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
2016
 
2015
 
2016
 
2015
Net Income
$
77.8

 
$
57.6

 
$
135.3

 
$
112.7

Weighted Average Shares:
 
 
 
 
 
 
 
Basic
322.1


330.2


323.3


329.9

Dilutive Effect of RSUs and Stock Awards
0.4

 
0.7

 
0.8

 
1.0

Diluted
322.5


330.9


324.1


330.9

Income Per Share — Basic
$
0.24

 
$
0.17

 
$
0.42

 
$
0.34

 Income Per Share — Diluted
$
0.24

 
$
0.17

 
$
0.42

 
$
0.34