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Pension Plans and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Pension Plans and Other Postretirement Benefits
Pension Plans and Other Postretirement Benefits

The components of net periodic benefit (income) costs recognized during interim periods were as follows:

 
Pension Benefits
 
Other Postretirement Benefits (“OPEB”)
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
(In millions)
Service costs
$
0.6

 
$
0.7

 
$
1.8

 
$
1.9

 
$
—

 
$
—

 
$
—

 
$
—

Interest costs
0.5

 
0.5

 
1.4

 
1.7

 
0.1

 
0.2

 
0.3

 
0.5

Expected return on plan assets
(2.3
)
 
(2.6
)
 
(7.1
)
 
(7.6
)
 
—

 
—

 
—

 
—

Recognized net actuarial loss
0.3

 
—

 
0.9

 
—

 
—

 
0.2

 
0.2

 
0.5

Net periodic benefit (income) costs
$
(0.9
)
 
$
(1.4
)
 
$
(3.0
)
 
$
(4.0
)
 
$
0.1

 
$
0.4

 
$
0.5

 
$
1.0