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Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues | [1] | $ 19,584 | $ 25,118 | $ 35,298 | $ 46,448 |
Lower of cost or market inventory valuation adjustment |  | (454) | 0 | (747) | 0 |
Asset impairment loss |  | 56 | 0 | 56 | 0 |
Operating income (loss) |  | 1,231 | 2,078 | 2,060 | 3,573 |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 45,452 |  | 45,452 |  | $ 44,227
Refining [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 18,664 | 24,350 | 33,584 | 44,879 |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 38,634 |  | 38,634 |  | 38,068
Ethanol [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 920 | 768 | 1,714 | 1,569 |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 1,005 |  | 1,005 |  | 1,016
Corporate and Other [Member] |  |  |  |  |  |
Total Assets by Reportable Segment |  |  |  |  |  |
Reportable segment assets |  | 5,813 |  | 5,813 |  | $ 5,143
Operating Segments [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 19,629 | 25,155 | 35,377 | 46,513 |
Operating Segments [Member] | Refining [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 18,664 | 24,350 | 33,584 | 44,879 |
Lower of cost or market inventory valuation adjustment |  | (434) |  | (697) |  |
Asset impairment loss |  | 56 |  | 56 |  |
Operating income (loss) |  | 1,332 | 2,161 | 2,290 | 3,802 |
Operating Segments [Member] | Ethanol [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 965 | 805 | 1,793 | 1,634 |
Lower of cost or market inventory valuation adjustment |  | (20) |  | (50) |  |
Asset impairment loss |  | 0 |  | 0 |  |
Operating income (loss) |  | 69 | 108 | 108 | 120 |
Intersegment Eliminations [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Operating revenues |  | 45 | 37 | 79 | 65 |
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 |  | 45 | 37 | 79 | 65 |
Corporate, Non-Segment [Member] | Corporate and Other [Member] |  |  |  |  |  |
Segment Information for our Reportable Segments |  |  |  |  |  |
Asset impairment loss |  | 0 |  | 0 |  |
Operating income (loss) |  | $ (170) | $ (191) | $ (338) | $ (349) |
[1] | Includes excise taxes on sales by certain of our international operations of $1,470 million and $1,513 million for the three months ended June 30, 2016 and 2015, respectively, and $2,865 million and $2,939 million for the six months ended June 30, 2016 and 2015, respectively.

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