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Inventories (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Mar. 31, 2020
Schedule of Inventories |  |  |  |  |  |
Refinery feedstocks | $ 1,646 |  | $ 1,646 |  | $ 1,979 |
Refined petroleum products and blendstocks | 3,944 |  | 3,944 |  | 3,425 |
Renewable diesel feedstocks and products | 113 |  | 113 |  | 50 |
Ethanol feedstocks and products | 233 |  | 233 |  | 297 |
Materials and supplies | 291 |  | 291 |  | 287 |
Inventories | 6,227 |  | 6,227 |  | 6,038 |
Inventories (Textual) |  |  |  |  |  |
LCM inventory valuation reserve |  |  |  |  |  | $ 2,500
Lower of cost or market (LCM) inventory valuation adjustment | 0 | $ (313) | 0 | $ (19) |  |
Excess of market value over carrying amount of LIFO inventories | 5,200 |  | 5,200 |  | 1,300 |
Liquidation of LIFO inventory, increase to cost of materials and other |  | $ 326 |  | $ 326 |  |
Amount of non-LIFO inventory | $ 1,200 |  | $ 1,200 |  | $ 918 |

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