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Revenue and Contracts with Customers (Contract with Customer Asset and Liability) (Details) - USD ($) $ in Millions | 9 Months Ended |
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Sep. 30, 2025 | Dec. 31, 2024
Deferred revenue | $ 154.8 | $ 183.6
Deferred revenue – change | (28.8) |
Contract With Customer, Advances, Liability, Current | 0.0 | $ 32.8
Advances from customers, current | $ (32.8) |

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- Definition Advances from customers change + 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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- Definition Contract With Customer, Advances, Liability, Current + References No definition available. + Details
Name: | leu_ContractWithCustomerAdvancesLiabilityCurrent
Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(26)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of increase (decrease) in deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration