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Inventories (Notes) | 3 Months Ended
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Mar. 31, 2021
Inventory, Net [Abstract] |
Inventories | INVENTORIES Inventories consist principally of natural gas held in storage, NGLs, and refined products, crude oil and spare parts, all of which are valued at the lower of cost or net realizable value utilizing the weighted-average cost method. Sunoco LP’s fuel inventories are stated at the lower of cost or market using the last-in, first-out (“LIFO”) method. As of March 31, 2021 and December 31, 2020, the carrying value of Sunoco LP’s fuel inventory included lower of cost or market reserves of $211 million and $311 million, respectively, and the inventory carrying value equaled or exceeded its replacement cost. For the three months ended March 31, 2021 and 2020, the Partnership’s consolidated income statements did not include any material amounts of income from the liquidation of LIFO fuel inventory.
| March 31, 2021 |  | December 31, 2020
Natural gas, NGLs and refined products | $ | 1,020 |  |  | $ | 1,013 |
Crude oil | 350 |  |  | 287 |
Spare parts and other | 440 |  |  | 439 |
Total inventories | $ | 1,810 |  |  | $ | 1,739 |
We utilize commodity derivatives to manage price volatility associated with our natural gas inventory. Changes in fair value of designated hedged inventory are recorded in inventory on our consolidated balance sheets and cost of products sold in our consolidated statements of operations.

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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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