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Stock-Based Compensation Plans (Tables)
 9 Months Ended
Sep. 30, 2015
Share-based Compensation [Abstract]  
Schedule of Stock Based Compensation Expense
Stock-based compensation expense consists of the following:
(In millions)
For the Three Months Ended 
 September 30,
 
For the Nine Months Ended 
 September 30,
 
2015
 
2014
 
2015
 
2014
Restricted stock
$
0.8

 
$
0.6

 
$
2.5

 
$
2.2

Restricted stock units
2.5

 
1.2

 
7.5

 
7.4

Total
$
3.3

 
$
1.8

 
$
10.0

 
$
9.6