XML 37 R26.htm IDEA: XBRL DOCUMENT v3.7.0.1
Components of Net Periodic Benefit Cost (Tables)
 3 Months Ended
Mar. 31, 2017
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
Components of net periodic benefit cost
 
 
Three Months Ended March 31,
 
 
Pension Benefits
 
Other Benefits
(in millions)
 
2017
 
2016
 
2017
 
2016
Service cost - benefits earned during the period
 
$
1.8

 
$
1.9

 
$
—

 
$
—

Interest cost on projected benefit obligation
 
7.6

 
8.2

 
—

 


Expected return on plan assets
 
(12.1
)
 
(12.9
)
 
—

 
—

Settlement loss
 
—

 
0.1

 
—

 
—

Amortization:
 
 
 
 
 
 
 
 
Prior service cost
 
0.2

 
0.2

 
—

 
—

Actuarial net loss (gain)
 
3.5

 
3.6

 
(0.2
)
 
(0.2
)
Net periodic benefit cost
 
$
1.0

 
$
1.1

 
$
(0.2
)
 
$
(0.2
)