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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2018
Inventories |
Inventories |
($ millions) |  | December 31 2018 |  | December 31 2017 |
Crude oil |  | 1 177 |  | 1 203 |
Refined products |  | 1 033 |  | 1 268 |
Materials, supplies and merchandise |  | 702 |  | 664 |
Energy trading commodity inventories |  | 247 |  | 333 |
|  | 3 159 |  | 3 468 |

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References No definition available. + Details
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