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SHARE-BASED COMPENSATION (Tables)
 3 Months Ended
Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of the components and classification of share-based compensation expense
The following table summarizes the components and classification of share-based compensation expense related to stock options and restricted share units (“RSUs”) for the three-month periods ended March 31, 2014 and 2013:
 
Three Months Ended
March 31,
 
2014
 
2013
Stock options
$
5.1

 
$
3.4

RSUs
19.7

 
5.7

Share-based compensation expense
$
24.8

 
$
9.1

 
 
 
 
Research and development expenses
$
1.4

 
$
—

Selling, general and administrative expenses
23.4

 
9.1

Share-based compensation expense
$
24.8

 
$
9.1