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Segment Information | 6 Months Ended
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Jun. 30, 2014
Segment Reporting [Abstract] |
SEGMENT INFORMATION |
11. | SEGMENT INFORMATION
In May 2013, we completed the separation of our retail business, CST, and as a result, we no longer operate a retail business or report retail segment operating results. Segment activity related to our retail business prior to the separation is reflected in the retail segment results below. Motor fuel sales to CST, which were eliminated in consolidation prior to the separation, are reported as refining segment operating revenues from external customers after May 1, 2013. The following table reflects activity related to our reportable segments (in millions):
| Refining |  | Ethanol |  | Retail |  | Corporate |  | Total
Three months ended June 30, 2014: |  |  |  |  |  |  |  |  |
Operating revenues from external customers | $ | 33,457 |  |  | $ | 1,457 |  |  | $ | — |  |  | $ | — |  |  | $ | 34,914 |
Intersegment revenues | — |  |  | 9 |  |  | — |  |  | — |  |  | 9 |
Operating income (loss) | 1,079 |  |  | 187 |  |  | — |  |  | (181 | ) |  | 1,085 |
Three months ended June 30, 2013: |  |  |  |  |  |  |  |  |
Operating revenues from external customers | 31,564 |  |  | 1,491 |  |  | 979 |  |  | — |  |  | 34,034 |
Intersegment revenues | 671 |  |  | 15 |  |  | — |  |  | — |  |  | 686 |
Operating income (loss) | 918 |  |  | 95 |  |  | 39 |  |  | (247 | ) |  | 805 |
Six months ended June 30, 2014: |  |  |  |  |  |  |  |  |
Operating revenues from external customers | 65,909 |  |  | 2,668 |  |  | — |  |  | — |  |  | 68,577 |
Intersegment revenues | — |  |  | 34 |  |  | — |  |  | — |  |  | 34 |
Operating income (loss) | 2,359 |  |  | 430 |  |  | — |  |  | (353 | ) |  | 2,436 |
Six months ended June 30, 2013: |  |  |  |  |  |  |  |  |
Operating revenues from external customers | 61,117 |  |  | 2,495 |  |  | 3,896 |  |  | — |  |  | 67,508 |
Intersegment revenues | 2,876 |  |  | 70 |  |  | — |  |  | — |  |  | 2,946 |
Operating income (loss) | 2,127 |  |  | 109 |  |  | 81 |  |  | (454 | ) |  | 1,863 |
Total assets by reportable segment were as follows (in millions):
| June 30, 2014 |  | December 31, 2013
Refining | $ | 41,326 |  |  | $ | 40,834 |
Ethanol | 937 |  |  | 889 |
Corporate | 4,750 |  |  | 5,537 |
Total assets | $ | 47,013 |  |  | $ | 47,260 |
In March 2014, we purchased an idled corn ethanol plant in Mount Vernon, Indiana for $34 million from a wholly owned subsidiary of Aventine Renewable Energy Holdings, Inc. We expect to resume production during the third quarter of 2014. We will finalize our purchase accounting once a determination of the fair values of the assets acquired and liabilities assumed is available, pending the completion of independent appraisals and other evaluations.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599 + Details
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