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Inventories (Tables)
6 Months Ended
Jun. 30, 2023
Inventory, Net [Abstract]  
Schedule of Inventories Components of inventories are as follows (in millions):
 June 30, 2023December 31, 2022
 Current
Assets
Current
Liabilities
(a)
Inventories, NetCurrent
Assets
Current
Liabilities
(a)
Inventories, Net
Separative work units$19.9 $— $19.9 $24.1 $— $24.1 
Uranium268.7 72.8 195.9 185.1 60.8 124.3 
Total$288.6 $72.8 $215.8 $209.2 $60.8 $148.4 
(a)This includes inventories owed to suppliers for advances of uranium.