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Inventories (Tables)
6 Months Ended
Jun. 30, 2024
Inventory, Net [Abstract]  
Schedule of Inventories Components of inventories are as follows (in millions):
 June 30, 2024December 31, 2023
 Current
Assets
Current
Liabilities
(a)
Inventories, NetCurrent
Assets
Current
Liabilities
(a)
Inventories, Net
Separative work units$6.0 $0.6 $5.4 $21.9 $— $21.9 
Uranium189.3 0.5 188.8 284.5 84.3 200.2 
Total$195.3 $1.1 $194.2 $306.4 $84.3 $222.1 
(a)This includes inventories owed to suppliers for advances of uranium.