XML 19 R19.htm IDEA: XBRL DOCUMENT v3.20.1
Pension and Postretirement Benefit Plans
 3 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Pension and Postretirement Benefit Plans Pension and Postretirement Benefit Plans
The following table sets forth information regarding the Company’s share of pension and postretirement benefit plans’
components of net periodic cost for the three months ended March 31, 2020 and 2019:
($ millions)
Pension
 
Postretirement
 
Three months ended March 31
 
2020
 
2019
 
2020
 
2019
Service cost
$
1.2

 
$
1.0

 
$
—

 
$
—

Interest cost
2.4

 
2.9

 
0.1

 
0.2

Expected return on plan assets
(4.4
)
 
(4.2
)
 
—

 
—

Amortization of:
 
 
 
 
 
 
 
Negative prior service cost
—

 
—

 
(1.4
)
 
(1.4
)
Net actuarial loss
2.3

 
1.5

 
0.1

 
0.1

Net periodic cost (benefit)
$
1.5

 
$
1.2

 
$
(1.2
)
 
$
(1.1
)
 
 
 
 
 
 
 
 

The Company expects to contribute $15.0 million to its pension plan in 2020.