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Inventories | 9 Months Ended
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Sep. 30, 2019
Inventory Disclosure [Abstract] |
INVENTORIES | 3. INVENTORIES Inventories consisted of the following (in millions):
| September 30, 2019 |  | December 31, 2018
Refinery feedstocks | $ | 2,051 |  |  | $ | 2,265 |
Refined petroleum products and blendstocks | 3,746 |  |  | 3,653 |
Ethanol feedstocks and products | 253 |  |  | 298 |
Renewable diesel feedstocks and products | 53 |  |  | 52 |
Materials and supplies | 273 |  |  | 264 |
Inventories | $ | 6,376 |  |  | $ | 6,532 |
As of September 30, 2019 and December 31, 2018, the replacement cost (market value) of last-in, first-out (LIFO) inventories exceeded their LIFO carrying amounts by $2.6 billion and $1.5 billion, respectively. Our non-LIFO inventories accounted for $1.1 billion of our total inventories as of September 30, 2019 and December 31, 2018.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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