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Pension and Other Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits
The following table presents the components of net periodic cost for our pension and postretirement benefit plans.
 
Pension Benefits
 
Postretirement Benefits
Three Months Ended March 31,
2020

2019

2020

2019
Components of net periodic cost (a):
 
 
 
 
 
 
 
Service cost
$
7

 
$
7

 
$
1

 
$
—

Interest cost
41

 
48

 
3

 
4

Expected return on plan assets
(48
)
 
(46
)
 
—

 
—

Amortization of actuarial loss (gain) (b)
26

 
24

 
(4
)
 
(4
)
Net periodic cost
$
26

 
$
33

 
$
—

 
$
—


(a) Amounts reflect our domestic plans only.
(b) Reflects amounts reclassified from accumulated other comprehensive loss to net earnings.