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Inventories | 9 Months Ended
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Sep. 30, 2025
Inventory, Net [Abstract] |
Inventories | INVENTORIES Centrus holds uranium at licensed locations (e.g., fabricators) in the form of natural uranium hexafluoride and as the uranium component of LEU in transit to meet book transfer requests by customers and suppliers. Centrus also holds SWU as the SWU component of LEU at licensed locations or in transit to meet book transfer requests by customers and suppliers. Fabricators process LEU into fuel for use in nuclear reactors. The components of the Company’s inventories are as follows (in millions):
| September 30, 2025 |  | December 31, 2024
| Current Assets |  | Current Liabilities (a) |  | Inventories, Net |  | Current Assets |  | Current Liabilities (a) |  | Inventories, Net
Separative work units | $ | 11.7 |  |  | $ | — |  |  | $ | 11.7 |  |  | $ | 5.0 |  |  | $ | 2.5 |  |  | $ | 2.5 |
Uranium | 394.2 |  |  | 238.9 |  |  | 155.3 |  |  | 156.6 |  |  | 13.7 |  |  | 142.9 |
Conversion credits | 10.4 |  |  | — |  |  | 10.4 |  |  | — |  |  | — |  |  | — |
Total | $ | 416.3 |  |  | $ | 238.9 |  |  | $ | 177.4 |  |  | $ | 161.6 |  |  | $ | 16.2 |  |  | $ | 145.4 |
(a)This includes inventories owed to suppliers for advances of uranium. Inventories are valued at the lower of cost or net realizable value. The Company may borrow SWU or uranium from customers, suppliers or fabricators, in which case the Company will record the SWU and/or uranium and the related liability for the borrowing using the projected and forecasted purchase price over the borrowing period. During the three months ended September 30, 2025, the Company sold the U 3 O 8 contained in a quantity of UF 6 to a converter. Under the terms of the agreement, the Company delivered the UF 6 to the converter, and the converter transferred $10.4 million of conversion services credits contained in the UF 6 to the Company. In the nine months ended September 30, 2025, the Company repaid SWU inventory loans borrowed from a customer valued at $38.8 million by utilizing advances of SWU from the fabricator under an existing optimization agreement. In June 2025, the Company repaid a UF 6 inventory loan valued at $29.8 million. The Company performs quarterly revaluations of Long-Term Inventory Loans reflecting an updated projection of the timing and sources of inventory to be used for repayment. These revaluations were recorded to Cost of Sales and resulted in an increase to the related liability of $0.5 million and $4.1 million, for the three and nine months ended September 30, 2025, respectively, and $1.9 million and $3.7 million for the three and nine months ended September 30, 2024, 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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- References No definition available. + Details
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