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Inventories | 6 Months Ended
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Jun. 30, 2022
Inventory Disclosure [Abstract] |
Inventories | Inventories
| June 30, 2022 |  | December 31, 2021
Finished goods | $ | 486 |  |  | $ | 478 |
Work-in-process | 725 |  |  | 631 |
Purchased raw materials | 307 |  |  | 256 |
Operating supplies | 45 |  |  | 37 |
Total inventories | $ | 1,563 |  |  | $ | 1,402 |
At June 30, 2022 and December 31, 2021, the portion of inventories valued on a last-in, first-out (“LIFO”) basis was $627 and $523, respectively. These amounts exclude the effects of LIFO valuation reductions, which were $203 and $192 at June 30, 2022 and December 31, 2021, 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 -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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