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Pension and Other Postretirement Benefit Plans
 3 Months Ended
Mar. 31, 2015
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
Pension and Other Postretirement Benefit Plans
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS
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 March 31,
 
 
United States
Pension Benefits
 
Foreign
Pension Benefits
 
Other Postretirement
Benefits
Millions of dollars
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Service cost
 
$
1

 
$
—

 
$
1

 
$
1

 
$
1

 
$
1

Interest cost
 
38

 
42

 
8

 
4

 
5

 
6

Expected return on plan assets
 
(48
)
 
(48
)
 
(8
)
 
(3
)
 
—

 
—

Amortization:
 
 
 
 
 
 
 
 
 
 
 
 
Actuarial loss
 
13

 
11

 
1

 
2

 
—

 
—

Prior service credit
 
(1
)
 
(1
)
 


 
—

 
(9
)
 
(10
)
Settlement and curtailment (gain) loss
 
—

 
—

 
8

 
—

 
(47
)
 
—

Net periodic benefit cost (credit)
 
$
3

 
$
4

 
$
10

 
$
4

 
$
(50
)
 
$
(3
)

During the three months ended March 31, 2015, we recognized approximately $47 million from a curtailment gain due to the elimination of amounts credited to notional retiree health accounts for certain employees under age 50. The curtailment gain was recognized in our Consolidated Condensed Statement of Comprehensive Income with $43 million recorded in cost of goods sold and the remaining balance in selling, general and administrative, with an offset to accumulated other comprehensive loss, net of tax.