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Pension and Other Postretirement Benefit Plans | 3 Months Ended
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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.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450702-114947 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414199&loc=d3e39622-114963 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 + Details
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