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Postretirement Plans
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Postretirement Plans
Postretirement Plans
The components of net periodic benefit cost for the three months ended March 31 were as follows:

Pension
 
Other Postretirement Benefits
Three months ended March 31
2018

 
2017

 
2018

 
2017

Service cost

$108

 

$101

 

$24

 

$26

Interest cost
695

 
748

 
49

 
57

Expected return on plan assets
(1,002
)
 
(961
)
 
(2
)
 
(2
)
Amortization of prior service credits
(14
)
 
(10
)
 
(32
)
 
(34
)
Recognized net actuarial loss/(gain)
282

 
201

 
(3
)
 
3

Settlement/curtailment/other losses


 
1

 


 


Net periodic benefit cost

$69

 

$80

 

$36

 

$50

 
 
 
 
 
 
 
 
Net periodic benefit cost included in Earnings from operations

$82

 

$131

 

$22

 

$28

Net periodic benefit cost included in Other income, net
(42
)
 
(34
)
 
24

 
30

Net periodic benefit cost included in Earnings before income taxes

$40

 

$97

 

$46

 

$58