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Industry Segments (Tables) | 9 Months Ended
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Sep. 30, 2019
Segment Reporting [Abstract] |
Schedule of industry segments | The following tables present Occidental’s industry segments:
millions |  | Oil and Gas |  | Chemical |  | Marketing and Other Midstream |  | WES Midstream (a) |  | Corporate and Eliminations |  | Total
Three months ended September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 3,821 |  |  | $ | 1,071 |  |  | $ | 780 |  |  | $ | 383 |  |  | $ | (368 | ) |  | $ | 5,687 |
Income (loss) from continuing operations before income taxes |  | $ | 221 |  |  | $ | 207 |  |  | $ | 266 |  |  | $ | 134 |  |  | $ | (1,449 | ) | (b) | $ | (621 | )
Income tax expense |  | — |  |  | — |  |  | — |  |  | — |  |  | (116 | ) |  | (116 | )
Income (loss) from continuing operations |  | $ | 221 |  |  | $ | 207 |  |  | $ | 266 |  |  | $ | 134 |  |  | $ | (1,565 | ) |  | $ | (737 | )
Three months ended September 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 2,889 |  |  | $ | 1,185 |  |  | $ | 1,367 |  |  | $ | — |  |  | $ | (225 | ) |  | $ | 5,216 |
Income (loss) from continuing operations before income taxes |  | $ | 767 |  |  | $ | 321 |  |  | $ | 1,698 |  |  | $ | — |  |  | $ | (207 | ) |  | $ | 2,579 |
Income tax expense |  | — |  |  | — |  |  | — |  |  | — |  |  | (710 | ) |  | (710 | )
Income (loss) from continuing operations |  | $ | 767 |  |  | $ | 321 |  |  | $ | 1,698 |  |  | $ | — |  |  | $ | (917 | ) |  | $ | 1,869 |
Nine months ended September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 8,890 |  |  | $ | 3,128 |  |  | $ | 2,505 |  |  | $ | 383 |  |  | $ | (795 | ) |  | $ | 14,111 |
Income (loss) from continuing operations before income taxes |  | $ | 1,431 |  |  | $ | 680 |  |  | $ | 876 |  |  | $ | 134 |  |  | $ | (1,945 | ) | (b) | $ | 1,176 |
Income tax expense |  | — |  |  | — |  |  | — |  |  |  |  |  | (647 | ) |  | (647 | )
Income (loss) from continuing operations |  | $ | 1,431 |  |  | $ | 680 |  |  | $ | 876 |  |  | $ | 134 |  |  | $ | (2,592 | ) |  | $ | 529 |
Nine months ended September 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 7,874 |  |  | $ | 3,515 |  |  | $ | 2,359 |  |  | $ | — |  |  | $ | (686 | ) |  | $ | 13,062 |
Income (loss) from continuing operations before income taxes |  | $ | 2,297 |  |  | $ | 936 |  |  | $ | 2,127 |  |  | $ | — |  |  | $ | (584 | ) |  | $ | 4,776 |
Income tax expense |  | — |  |  | — |  |  | — |  |  |  |  |  | (1,351 | ) |  | (1,351 | )
Income (loss) from continuing operations |  | $ | 2,297 |  |  | $ | 936 |  |  | $ | 2,127 |  |  | $ | — |  |  | $ | (1,935 | ) |  | $ | 3,425 |
(a) The WES Midstream segment results represent the period from August 8, 2019, the Merger date, through September 30, 2019. (b) The three months ended September 30, 2019 includes merger-related costs of $924 million and amortized debt financing fees of $65 million. The nine months ended September 30, 2019 includes merger-related costs of $974 million and amortized debt financing fees of $122 million.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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