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Retirement Plans (Tables)
9 Months Ended
Sep. 30, 2018
Compensation And Retirement Disclosure [Abstract]  
Components of Net Pension and Other Postretirement Benefit Plan (OPEB) Income

Components of net pension and other postretirement benefits plan (“OPEB”) income for the three and nine months ended September 30, 2018 and 2017 were as follows:

 

 

Three Months Ended

 

 

Nine Months Ended

 

 

September 30,

 

 

September 30,

 

 

2018

 

 

2017

 

 

2018

 

 

2017

 

Pension expense (income):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

$

0.1

 

 

$

0.1

 

 

$

0.5

 

 

$

0.5

 

Interest cost

 

7.7

 

 

 

8.0

 

 

 

23.4

 

 

 

23.7

 

Expected return on plan assets

 

(12.4

)

 

 

(12.7

)

 

 

(37.6

)

 

 

(37.6

)

Amortization, net

 

2.0

 

 

 

1.9

 

 

 

5.9

 

 

 

5.4

 

Settlements

 

0.2

 

 

 

 

 

 

1.5

 

 

 

 

Net pension income

$

(2.4

)

 

$

(2.7

)

 

$

(6.3

)

 

$

(8.0

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPEB expense (income):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

$

(0.3

)

 

$

0.4

 

 

$

0.5

 

 

$

1.0

 

Interest cost

 

2.5

 

 

 

2.7

 

 

 

7.7

 

 

 

8.3

 

Expected return on plan assets

 

(3.5

)

 

 

(3.4

)

 

 

(10.5

)

 

 

(10.1

)

Amortization, net

 

(0.8

)

 

 

(0.7

)

 

 

(2.2

)

 

 

(2.2

)

Other

 

(5.1

)

 

 

 

 

 

(5.1

)

 

 

 

Net other postretirement benefit income

$

(7.2

)

 

$

(1.0

)

 

$

(9.6

)

 

$

(3.0

)