XML 76 R33.htm IDEA: XBRL DOCUMENT v3.19.3
Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of stock-based compensation expense A summary of the Company’s stock-based compensation expense is presented in the following table:
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
(in millions)
2019
 
2018
 
2019
 
2018
PRSU expense
$
0.3

 
$
0.7

 
$
1.0

 
$
2.2

Option expense
1.3

 
1.6

 
3.7

 
5.4

RSU/DSU expense
5.2

 
4.2

 
15.3

 
12.0

Total stock-based compensation expense
$
6.8

 
$
6.5

 
$
20.0

 
$
19.6