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Retirement and Post-retirement Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2016
Retirement and Post-retirement Benefit Plans |
Components of the net periodic benefit costs | The following tables set forth the components of the net periodic benefit costs for Occidental’s defined benefit pension and post-retirement benefit plans for the three and nine months ended September 30, 2016 and 2015 (in millions):
Three months ended September 30 |  | 2016 |  | 2015
Net Periodic Benefit Costs |  | Pension Benefit |  | Post- retirement Benefit |  | Pension Benefit |  | Post- retirement Benefit |
Service cost |  | $ | 2 |  | $ | 4 |  | $ | 2 |  | $ | 7 |
Interest cost |  | 4 |  | 9 |  | 5 |  | 10 |
Expected return on plan assets |  | (6) |  | — |  | (7) |  | — |
Recognized actuarial loss |  | 3 |  | 3 |  | 3 |  | 6 |
Total |  | $ | 3 |  | $ | 16 |  | $ | 3 |  | $ | 23 |
Nine months ended September 30 |  | 2016 |  | 2015
Net Periodic Benefit Costs |  | Pension Benefit |  | Post- retirement Benefit |  | Pension Benefit |  | Post- retirement Benefit |
Service cost |  | $ | 6 |  | $ | 14 |  | $ | 6 |  | $ | 21 |
Interest cost |  | 12 |  | 29 |  | 15 |  | 30 |
Expected return on plan assets |  | (18) |  | — |  | (21) |  | — |
Recognized actuarial loss |  | 9 |  | 14 |  | 7 |  | 20 |
Settlement loss |  |  | 2 |  | — |  | — |  | — |
Total |  | $ | 11 |  | $ | 57 |  | $ | 7 |  | $ | 71 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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