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Pension and Postretirement Health and Life Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Customer A [Member] | Low Enriched Uranium Segment [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Revenue	$ 35.7	$ 42.3	$ 67.5
Customer A [Member] | Technical Solutions Segment [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Revenue	27.9	18.9	49.6	$ 38.7
Customer B [Member] | Low Enriched Uranium Segment [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Revenue	32.8	35.4	35.7
Customer C [Member] | Low Enriched Uranium Segment [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Revenue	$ 19.9	34.5	$ 32.8
Customer D [Member] | Low Enriched Uranium Segment [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Revenue		$ 30.2

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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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