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Inventories
 3 Months Ended
Mar. 31, 2024
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. Components of inventories are as follows (in millions):

 March 31, 2024December 31, 2023
 Current
Assets		Current
Liabilities
(a)		Inventories, NetCurrent
Assets		Current
Liabilities
(a)		Inventories, Net
Separative work units$20.7 $— $20.7 $21.9 $— $21.9 
Uranium258.5 21.6 236.9 284.5 84.3 200.2 
Total$279.2 $21.6 $257.6 $306.4 $84.3 $222.1 

(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 also may borrow SWU or uranium from customers or suppliers, in which case the Company will record the SWU and/or uranium and the related liability for the borrowing using a projected and forecasted purchase price over the borrowing period. In March 2023, the Company borrowed UF6 which was recorded to inventory at a value of $22.5 million, based on the estimated fair market value of the inventory on the date of borrowing.
The Company performs quarterly revaluations of the 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 $0.3 million and $2.1 million, for the three months ended March 31, 2024 and 2023, respectively.