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Segment Information Schedule Of Entity Wide Revenue By Major Customers (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Customer A [Member] | Low Enriched Uranium Segment [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 14.5	$ 10.4	$ 14.5	$ 28.5
Customer A [Member] | Technical Solutions Segment [Member]
Revenue, Major Customer [Line Items]
Revenue	12.3	15.2	24.0	30.8
Customer B [Member] | Low Enriched Uranium Segment [Member]
Revenue, Major Customer [Line Items]
Revenue	18.9	11.2	18.9	$ 14.5
Customer C [Member] | Low Enriched Uranium Segment [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 44.9	$ 14.5	$ 44.9

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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