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v2.4.1.9

Debt (Schedule of Deferred Financing Costs) (Details) (PIK toggle notes [Member], USD $) In Millions, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Mar. 31, 2015
PIK toggle notes [Member] |  |
Deferred financing costs, additions | $ 0.7 leu_DeferredFinancingCostsAdditions / us-gaap_StatementScenarioAxis = leu_PIKtogglenotesMember |
Deferred Finance Costs, End Balance |  | $ 0.6 us-gaap_DeferredFinanceCostsNoncurrentNet / us-gaap_StatementScenarioAxis = leu_PIKtogglenotesMember

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- Definition Deferred financing costs, additions + References No definition available. + Details
Name: | leu_DeferredFinancingCostsAdditions
Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Net amount of long-term deferred finance costs capitalized at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
Name: | us-gaap_DeferredFinanceCostsNoncurrentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant