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Segment Information (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 1 Months Ended |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 | Mar. 31, 2014 Mount Vernon [Member] | Sep. 30, 2014 Refining [Member] | Dec. 31, 2013 Refining [Member] | Sep. 30, 2014 Ethanol [Member] | Dec. 31, 2013 Ethanol [Member] | Sep. 30, 2014 Corporate and Other [Member] | Dec. 31, 2013 Corporate and Other [Member] | Sep. 30, 2014 Operating Segments [Member] Refining [Member] | Sep. 30, 2013 Operating Segments [Member] Refining [Member] | Sep. 30, 2014 Operating Segments [Member] Refining [Member] | Sep. 30, 2013 Operating Segments [Member] Refining [Member] | Sep. 30, 2014 Operating Segments [Member] Ethanol [Member] | Sep. 30, 2013 Operating Segments [Member] Ethanol [Member] | Sep. 30, 2014 Operating Segments [Member] Ethanol [Member] | Sep. 30, 2013 Operating Segments [Member] Ethanol [Member] | Sep. 30, 2014 Operating Segments [Member] Retail [Member] | Sep. 30, 2013 Operating Segments [Member] Retail [Member] | Sep. 30, 2014 Operating Segments [Member] Retail [Member] | Sep. 30, 2013 Operating Segments [Member] Retail [Member] | Sep. 30, 2014 Corporate, Non-Segment [Member] Corporate and Other [Member] | Sep. 30, 2013 Corporate, Non-Segment [Member] Corporate and Other [Member] | Sep. 30, 2014 Corporate, Non-Segment [Member] Corporate and Other [Member] | Sep. 30, 2013 Corporate, Non-Segment [Member] Corporate and Other [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] Refining [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] Refining [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] Refining [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] Refining [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] Ethanol [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] Ethanol [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] Ethanol [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] Ethanol [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] Retail [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] Retail [Member] | Sep. 30, 2014 Intersegment Eliminations [Member] Retail [Member] | Sep. 30, 2013 Intersegment Eliminations [Member] Retail [Member]
Segment information for our reportable segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 34,408 | $ 36,137 | $ 102,985 | $ 103,645 |  |  |  |  |  |  |  |  | $ 33,274 | $ 34,747 | $ 99,183 | $ 95,864 | $ 1,134 | $ 1,390 | $ 3,802 | $ 3,885 | $ 0 | $ 0 | $ 0 | $ 3,896 | $ 0 | $ 0 | $ 0 | $ 0 | $ 21 | $ 16 | $ 55 | $ 2,962 | $ 0 | $ 0 | $ 0 | $ 2,876 | $ 21 | $ 16 | $ 55 | $ 86 | $ 0 | $ 0 | $ 0 | $ 0
Operating income (loss) | 1,670 | 532 | 4,106 | 2,395 |  |  |  |  |  |  |  |  | 1,664 | 600 | 4,023 | 2,727 | 198 | 113 | 628 | 222 | 0 | 0 | 0 | 81 | (192) | (181) | (545) | (635) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets by reportable segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reportable segment assets | 48,455 |  | 48,455 |  | 47,260 |  | 42,378 | 41,227 | 916 | 889 | 5,161 | 5,144 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Ethanol Plant (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire idled corn ethanol plant |  |  |  |  |  | $ 34 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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