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Pension and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
The components of net periodic benefit cost were as follows:
 
Second quarter ended

Six months ended
 
June 30,

June 30,
 
2018
 
2017

2018
 
2017
Pension benefits
 
 
 
 
 
 
 
Service cost
$
8

 
$
21

 
$
28

 
$
44

Interest cost
55

 
58

 
110

 
116

Expected return on plan assets
(77
)
 
(82
)
 
(154
)
 
(165
)
Recognized net actuarial loss
42

 
55

 
84

 
110

Amortization of prior service cost (benefit)
1

 
2

 
2

 
3

Curtailments
9

 
—

 
14

 
—

Net periodic benefit cost(1)
$
38

 
$
54

 
$
84

 
$
108

 
 
 
 
 
 
 
 
Other postretirement benefits
 
 
 
 
 
 
 
Service cost
$
2

 
$
2

 
$
4

 
$
4

Interest cost
7

 
7

 
14

 
15

Recognized net actuarial loss
2

 
1

 
4

 
2

Amortization of prior service cost (benefit)
(2
)
 
(2
)
 
(4
)
 
(4
)
Net periodic benefit cost(1)
$
9

 
$
8

 
$
18

 
$
17

 
(1) 
Service cost was included within Cost of goods sold, Selling, general administrative, and other expenses, and Research and development expenses; curtailments were included in Restructuring and other charges; and all other cost components were recorded in Other expense (income), net in the Statement of Consolidated Operations.