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Inventories | 12 Months Ended
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Dec. 31, 2024
Inventory Disclosure [Abstract] |
Inventories | Inventories
December 31, | 2024 |  | 2023
Finished goods | $ | 458 |  |  | $ | 451 |
Work-in-process | 903 |  |  | 891 |
Purchased raw materials | 408 |  |  | 355 |
Operating supplies | 71 |  |  | 68 |
Total inventories | $ | 1,840 |  |  | $ | 1,765 |
As of December 31, 2024 and 2023, the portion of inventories valued on a LIFO basis was $544 and $446, respectively. If valued on an average-cost basis, total inventories would have been $280 and $236 higher as of December 31, 2024 and 2023, respectively. In 2024, we did not have any LIFO inventory layer liquidations. Reductions in LIFO inventory quantities caused partial liquidations of LIFO inventory layers resulting in the recognition of a benefit of $1 in 2023 and recognition of expense of less than $1 in 2022.

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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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