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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventory, Net [Abstract]  
Schedule of Inventories Components of inventories are as follows (in millions):
 March 31, 2022December 31, 2021
 Current
Assets
Current
Liabilities
(a)
Inventories, NetCurrent
Assets
Current
Liabilities
(a)
Inventories, Net
Separative work units$11.3 $— $11.3 $8.8 $— $8.8 
Uranium78.1 0.3 77.8 82.3 8.4 73.9 
Total$89.4 $0.3 $89.1 $91.1 $8.4 $82.7 
(a)Inventories owed to customers and suppliers, included in current liabilities, include SWU and uranium inventories owed to fabricators.