XML 40 R29.htm IDEA: XBRL DOCUMENT v3.5.0.2
Components of Net Periodic Benefit Cost (Tables)
 6 Months Ended
Jun. 30, 2016
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
Components of net periodic benefit cost
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions)
 
2016
 
2015
 
2016
 
2015
Service cost - benefits earned during the period
 
$
1.9

 
$
1.9

 
$
3.8

 
$
3.9

Interest cost on projected benefit obligation
 
8.2

 
8.1

 
16.4

 
16.3

Expected return on plan assets
 
(12.9
)
 
(12.7
)
 
(25.8
)
 
(25.4
)
Settlement loss
 
5.8

 
—

 
5.9

 
—

Amortization:
 
 
 
 
 
 
 
 
Prior service cost
 
0.2

 
0.3

 
0.4

 
0.5

Actuarial net loss
 
3.7

 
5.1

 
7.3

 
10.1

Net periodic benefit cost
 
$
6.9

 
$
2.7

 
$
8.0

 
$
5.4