Inventories (Schedule of Inventories) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Inventory, Net [Abstract]
Separative work units inventory	$ 11.3	$ 8.8
Uranium inventory	78.1	82.3
Inventories	89.4	91.1
Separative work units owed to customers and suppliers	0.0	0.0
Uranium owed to customers and suppliers	0.3	8.4
Inventories owed to customers and suppliers	0.3	8.4
Separative work units net of liability	11.3	8.8
Uranium inventory net of liability	77.8	73.9
Inventories, net	$ 89.1	$ 82.7

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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