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Pension and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2019
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,
 
2019
 
2018

2019
 
2018
Pension benefits
 
 
 
 
 
 
 
Service cost
$
6

 
$
8

 
$
13

 
$
28

Interest cost
59

 
55

 
118

 
110

Expected return on plan assets
(71
)
 
(77
)
 
(143
)
 
(154
)
Recognized net actuarial loss
34

 
42

 
69

 
84

Amortization of prior service cost (benefit)
1

 
1

 
1

 
2

Settlements
2

 
—

 
4

 
—

Curtailments
—

 
9

 
—

 
14

Net periodic benefit cost(1)
$
31

 
$
38

 
$
62

 
$
84

 
 
 
 
 
 
 
 
Other postretirement benefits
 
 
 
 
 
 
 
Service cost
$
2

 
$
2

 
$
4

 
$
4

Interest cost
7

 
7

 
14

 
14

Recognized net actuarial loss
1

 
2

 
2

 
4

Amortization of prior service cost (benefit)
(2
)
 
(2
)
 
(3
)
 
(4
)
Curtailments
—

 
—

 
(58
)
 
—

Net periodic benefit cost(1)
$
8

 
$
9

 
$
(41
)
 
$
18

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