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Inventories (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Inventory, Net [Abstract] |  |  |  |  |  |
Separative work units valuation change in period | $ 0.5 | $ 1.9 |  | $ 4.1 | $ 3.7 |
Separative work units repaid in period, value |  |  | $ (38.8) |  |  |
Conversion credits, inventory | $ 10.4 |  |  | $ 10.4 |  | $ 0.0
UF6 repaid in period, value |  |  | $ 29.8 |  |  |

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- Definition Borrowed inventory valuation change in period + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Conversion credits, inventory + References No definition available. + Details
Name: | leu_ConversionCreditsInventory
Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Separative work units repaid in period, value + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition UF6 repaid in period, value + References No definition available. + Details
Name: | leu_UF6RepaidInPeriodValue
Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration