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Segment Information (Segment Reporting Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 293.8	$ 298.3	$ 247.2
Gross Profit	117.9	114.5	97.6
Low Enriched Uranium Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	130.6	73.0	97.8
Technical Solutions Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	(12.7)	41.5	(0.2)
Product [Member]
Segment Reporting Information [Line Items]
Revenue	235.6	186.1	190.5
Separative Work Units [Member]
Segment Reporting Information [Line Items]
Revenue	196.2	163.3	151.5
Uranium [Member]
Segment Reporting Information [Line Items]
Revenue	$ 39.4	$ 22.8	$ 39.0

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