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Inventories | 6 Months Ended
--- | ---
Jun. 30, 2023
Inventory Disclosure [Abstract] |
Inventories | Inventories
| June 30, 2023 |  | December 31, 2022
Finished goods | $ | 488 |  |  | $ | 490 |
Work-in-process | 800 |  |  | 748 |
Purchased raw materials | 364 |  |  | 317 |
Operating supplies | 63 |  |  | 54 |
Total inventories | $ | 1,715 |  |  | $ | 1,609 |
As of June 30, 2023 and December 31, 2022, the portion of inventories valued on a last-in, first-out (“LIFO”) basis was $423 and $441, respectively. If valued on an average-cost basis, total inventories would have been $228 and $220 higher as of June 30, 2023 and December 31, 2022, respectively.

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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 -Topic 330 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//330/tableOfContent + Details
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