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Inventories, Net | 3 Months Ended
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Mar. 31, 2023
Inventory Disclosure [Abstract] |
Inventories, Net | Inventories, Net Inventories, net consisted of the following:
| March 31, 2023 |  | December 31, 2022
Raw materials | $ | 284 |  |  | $ | 261 |
Work-in-process | 144 |  |  | 125 |
Finished goods, net | 691 |  |  | 641 |
Materials and supplies, net | 240 |  |  | 251 |
Inventories, net – current | $ | 1,359 |  |  | $ | 1,278 |
Materials and supplies, net consists of processing chemicals, maintenance supplies and spare parts, which will be consumed directly and indirectly in the production of our products. At March 31, 2023 and December 31, 2022, inventory obsolescence reserves primarily for materials and supplies were $43 million and $42 million, respectively. Reserves for lower of cost or market and net realizable value were $24 million and $27 million at March 31, 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 -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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