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STOCK COMPENSATION (Tables)
 3 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Based Compensation
The following table represents total stock based compensation expense for non-qualified stock options, restricted stock units (“RSU”) and the tax related benefit for the three months ended March 31, 2017 and 2016.
 
 
Three Months Ended
(in millions)
 
2017
 
2016
 
 
 
 
 
Stock option expense
 
$
2.7

 
$
2.1

RSU expense
 
7.7

 
2.4

Total stock based compensation expense
 
$
10.4

 
$
4.5

 
 
 
 
 
Related deferred income tax benefit
 
$
3.3

 
$
1.3