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Employee Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2018
Employee Benefit Plans [Abstract] |
Pension and Postretirement Plans |
Note 18—Employee Benefit Plans |  |  |  |  |  |  |  |  |  |  |  |
Pension and Postretirement Plans |  |  |  |  |  |  |  |  |  |  |  |
| Millions of Dollars
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2018 |  | 2017
|  | U.S. |  | Int'l. |  | U.S. |  | Int'l. |  |  |  |
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended September 30 |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 20 |  | 20 |  | 21 |  | 20 |  | - |  | -
Interest cost |  | 22 |  | 26 |  | 29 |  | 27 |  | 2 |  | 3
Expected return on plan assets |  | (22) |  | (38) |  | (32) |  | (41) |  | - |  | -
Amortization of prior service cost (credit) |  | - |  | (1) |  | 1 |  | (1) |  | (9) |  | (9)
Recognized net actuarial loss (gain) |  | 10 |  | 9 |  | 17 |  | 12 |  | - |  | (1)
Settlements |  | 14 |  | - |  | 21 |  | - |  | - |  | -
Curtailments |  | - |  | (1) |  | - |  | - |  | - |  | -
Net periodic benefit cost | $ | 44 |  | 15 |  | 57 |  | 17 |  | (7) |  | (7)
Nine Months Ended September 30 |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 63 |  | 63 |  | 67 |  | 59 |  | 1 |  | 1
Interest cost |  | 76 |  | 80 |  | 90 |  | 78 |  | 6 |  | 7
Expected return on plan assets |  | (91) |  | (118) |  | (97) |  | (119) |  | - |  | -
Amortization of prior service cost (credit) |  | - |  | (4) |  | 3 |  | (4) |  | (26) |  | (27)
Recognized net actuarial loss (gain) |  | 41 |  | 27 |  | 53 |  | 36 |  | (1) |  | (2)
Settlements |  | 161 |  | - |  | 118 |  | - |  | - |  | -
Curtailments |  | - |  | (1) |  | - |  | - |  | - |  | -
Net periodic benefit cost | $ | 250 |  | 47 |  | 234 |  | 50 |  | (20) |  | (21)
Severance accrual |
|  | Millions of Dollars
Balance at December 31, 2017 | $ | 53
Accruals |  | 65
Benefit payments |  | (38)
Balance at September 30, 2018 | $ | 80

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- Definition Tabular disclosure of the aggregate benefit obligation and aggregate fair value of plan assets for pension plans and/or other employee benefit plans with benefit obligations in excess of plan assets as of the measurement date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 + Details
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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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