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Inventories (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Inventory, Net [Abstract] |  |  |  |  |
UF6 units borrowed in period, value |  |  | $ 22.5 |  |
Inventory Loans, Current & Noncurrent | $ 84.6 |  | 84.6 |  | $ 58.6
Inventory Loans, Current | 9.9 |  | 9.9 |  | $ 9.9
Separative work units valuation change in period | $ 0.6 | $ 0.0 | $ 3.5 | $ 5.5 |

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- Definition Inventory Loans, Current + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Inventory Loans, Current & Noncurrent + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Separative work units valuation change in period + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition UF6 units borrowed in period, value + References No definition available. + Details
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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