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v2.4.1.9

Commitment and Contingencies (Details) (USD $) | 7 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2016
ACTDO DOE Funding – Monthly | $ 6,900,000 leu_ACTDODOEFundingMonthly | $ 6,700,000 leu_ACTDODOEFundingMonthly |  |  |
Liability for decontamination and decommissioning |  |  | 22,600,000 us-gaap_AssetRetirementObligation |  |
D&D financial assurance |  |  | 29,400,000 leu_AROfinancialassurance |  |
Accrued liabilities for stored wastes |  |  | 1,000,000 leu_Accruedliabilitiesforstoredwastes | 1,800,000 leu_Accruedliabilitiesforstoredwastes |
Accrued lease turnover - Portsmouth, current |  |  | 2,600,000 leu_AccruedleaseturnoverPortsmouthcurrent | 5,500,000 leu_AccruedleaseturnoverPortsmouthcurrent |
Operating Leases, Rent Expense |  |  | 7,000,000 us-gaap_LeaseAndRentalExpense | 7,100,000 us-gaap_LeaseAndRentalExpense |
Scenario, Forecast [Member] |  |  |  |  |
FY16 budget request for centrifuge program |  |  |  |  | 100,000,000 leu_FY16budgetrequestforcentrifugeprogram / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember
Minimum [Member] |  |  |  |  |
ACP Sales Royalty Rate |  |  | 1.00%leu_ACPSalesRoyaltyRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
ACP Sales Royalty |  |  | 100,000 leu_ACPSalesRoyalty / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Maximum [Member] |  |  |  |  |
ACP Sales Royalty Rate |  |  | 2.00%leu_ACPSalesRoyaltyRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
ACP Sales Royalty |  |  | $ 100,000,000 leu_ACPSalesRoyalty / us-gaap_RangeAxis = us-gaap_MaximumMember |  |

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- Definition Accrued lease turnover - Portsmouth, current + References No definition available. + Details
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- Definition American Centrifuge Plant (ACP) Sales Royalty Rate + References No definition available. + Details
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- Definition ARO financial assurance + References No definition available. + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Asset Retirement Obligation -URI http://asc.fasb.org/extlink&oid=6505190 + Details
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