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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Allocated Share-based Compensation Expense
he Company recognized the following stock-based compensation expense in direct operating expense and sales, general and administrative expense:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(In millions)
2016
 
2015
 
2016
 
2015
Stock options
$
0.3

 
$
0.8

 
$
0.7

 
$
1.3

Stock appreciation rights
(0.4
)
 
—

 
—

 
—

Restricted stock units
2.8

 
1.0

 
7.5

 
2.2

Performance-based restricted stock units
2.5

 
12.8

 
4.1

 
13.4

Cash-settled performance-based restricted stock units
3.4

 
—

 
8.2

 
—

Warrants
—

 
8.5

 
—

 
8.5

Total stock-based compensation expense
$
8.6

 
$
23.1

 
$
20.5

 
$
25.4