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Pension and Other Postretirement Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The following table summarizes the components of net periodic pension cost and the cost of other postretirement benefits for the periods presented:


Three Months Ended June 30,


United States
Pension Benefits

Foreign
Pension Benefits

Other Postretirement
Benefits
Millions of dollars

2020

2019

2020

2019

2020

2019
Service cost

$
—


$
—


$
1


$
2


$
1


$
1

Interest cost

24


31


5


6


3


4

Expected return on plan assets

(41
)

(45
)

(7
)

(8
)

—


—

Amortization:












Actuarial loss

16


12


3


2


—


—

Prior service credit

—


—


—


—


(2
)

(3
)
Settlement and curtailment (gain) loss

—


—


—


—


(4
)

—

Net periodic benefit cost (credit)

$
(1
)

$
(2
)

$
2


$
2


$
(2
)

$
2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30,
 
 
United States
Pension Benefits
 
Foreign
Pension Benefits
 
Other Postretirement
Benefits
Millions of dollars
 
2020

2019

2020

2019

2020

2019
Service cost
 
$
1

 
$
1

 
$
3

 
$
3

 
$
3

 
$
3

Interest cost
 
49

 
62

 
9

 
12

 
6

 
8

Expected return on plan assets
 
(82
)
 
(89
)
 
(15
)
 
(15
)
 
—

 
—

Amortization:
 
 
 
 
 
 
 
 
 
 
 
 
Actuarial loss
 
31

 
24

 
6

 
4

 
—

 
—

Prior service credit
 
—

 
(1
)
 
—

 
—

 
(4
)
 
(5
)
Settlement and curtailment (gain) loss
 
—

 
—

 
—

 
1

 
(4
)
 
(7
)
Net periodic benefit cost (credit)
 
$
(1
)
 
$
(3
)
 
$
3

 
$
5

 
$
1

 
$
(1
)

The following table summarizes the net periodic cost recognized in operating profit and interest and sundry (income) expense for the periods presented:
 
 
Three Months Ended June 30,
 
 
United States
Pension Benefits
 
Foreign
Pension Benefits
 
Other Postretirement
Benefits
Millions of dollars
 
2020
 
2019
 
2020
 
2019
 
2020
 
2019
Operating profit (loss)
 
$
—

 
$
—

 
$
1

 
$
2

 
$
1

 
$
1

Interest and sundry (income) expense
 
(1
)
 
(2
)
 
1

 
—

 
(3
)
 
1

Net periodic benefit cost
 
$
(1
)
 
$
(2
)
 
$
2

 
$
2

 
$
(2
)
 
$
2


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30,
 
 
United States
Pension Benefits
 
Foreign
Pension Benefits
 
Other Postretirement
Benefits
Millions of dollars
 
2020
 
2019
 
2020
 
2019
 
2020
 
2019
Operating profit (loss)
 
$
1

 
$
1

 
$
3

 
$
3

 
$
3

 
$
3

Interest and sundry (income) expense
 
(2
)
 
(4
)
 
—

 
2

 
(2
)
 
(4
)
Net periodic benefit cost
 
$
(1
)
 
$
(3
)
 
$
3

 
$
5

 
$
1

 
$
(1
)