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Inventories | 9 Months Ended
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Sep. 30, 2025
Inventories |
Inventories | Note 4. Inventories Inventories are stated at lower of cost or net realizable value. Cost is determined using a weighted average cost method for raw materials (including scrap and purchased steel substrate) and supplies, and on a first-in, first-out basis for other inventory. Inventory consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​
​ | September 30, | ​ | December 31,
​ | 2025 | ​ | 2024
Raw materials | $ | 1,430,372 | ​ | $ | 1,323,920
Supplies | ​ | 809,833 | ​ | ​ | 805,035
Work in progress | ​ | 372,263 | ​ | ​ | 269,031
Finished goods | ​ | 583,192 | ​ | ​ | 715,747
Total inventories | $ | 3,195,660 | ​ | $ | 3,113,733
​

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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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