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Inventories (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Schedule of Inventories |  |  |
Refinery feedstocks | $ 2,016 |  | $ 2,399
Refined petroleum products and blendstocks | 3,616 |  | 4,034
Renewable diesel feedstocks and products | 44 |  | 46
Ethanol feedstocks and products | 270 |  | 260
Materials and supplies | 277 |  | 274
Inventories before LCM inventory valuation reserve | 6,223 |  | 7,013
LCM inventory valuation reserve | (2,548) |  | 0
Inventories | 3,675 |  | 7,013
Inventories (Textual) |  |  |
Lower of cost or market (LCM) inventory valuation adjustment | 2,542 | $ 0 |
Excess of market value over carrying amount of LIFO inventories |  |  | 2,500
Amount of non-LIFO inventory | $ 1,100 |  | $ 1,400

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