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Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues | [1] | $ 19,649 | $ 22,579 | $ 54,947 | $ 69,027 |
Lower of cost or market inventory valuation adjustment |  | 0 | 0 | (747) | 0 |
Asset impairment loss |  | 0 | 0 | 56 | 0 |
Operating income (loss) |  | 892 | 2,139 | 2,952 | 5,712 |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 46,265 |  | 46,265 |  | $ 44,227
Refining [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 18,718 | 21,739 | 52,302 | 66,618 |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 37,993 |  | 37,993 |  | 38,068
Ethanol [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 931 | 840 | 2,645 | 2,409 |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 1,277 |  | 1,277 |  | 1,016
Corporate and Other [Member] |  |  |  |  |  |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 6,995 |  | 6,995 |  | $ 5,143
Operating Segments [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 19,705 | 22,618 | 55,082 | 69,131 |
Operating Segments [Member] | Refining [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 18,718 | 21,739 | 52,302 | 66,618 |
Lower of cost or market inventory valuation adjustment |  |  |  | (697) |  |
Asset impairment loss |  |  |  | 56 |  |
Operating income (loss) |  | 990 | 2,295 | 3,280 | 6,097 |
Operating Segments [Member] | Ethanol [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 987 | 879 | 2,780 | 2,513 |
Lower of cost or market inventory valuation adjustment |  |  |  | (50) |  |
Asset impairment loss |  |  |  | 0 |  |
Operating income (loss) |  | 106 | 35 | 214 | 155 |
Intersegment Eliminations [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 56 | 39 | 135 | 104 |
Intersegment Eliminations [Member] | Refining [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 0 | 0 | 0 | 0 |
Intersegment Eliminations [Member] | Ethanol [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 56 | 39 | 135 | 104 |
Corporate, Non-Segment [Member] | Corporate and Other [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Asset impairment loss |  |  |  | 0 |  |
Operating income (loss) |  | $ (204) | $ (191) | $ (542) | $ (540) |
[1] | Includes excise taxes on sales by certain of our international operations of $1,398 million and $1,538 million for the three months ended September 30, 2016 and 2015, respectively, and $4,263 million and $4,477 million for the nine months ended September 30, 2016 and 2015, respectively.

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