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Commitment and Contingencies (Details) (USD $) | 19 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Maximum funding for RD&D Program - Revised Estimate | $ 320,000,000 |  |  |  |
RD&D Program Funding by DOE | 80.00% |  |  |  |
RD&D Program Funding by USEC | 20.00% |  |  |  |
RD&D Program Funding by DOE To Date | 241,300,000 |  |  |  |
RD&D Program Funding by DOE - Increment 5 | 13,600,000 |  |  |  |
Amount of application under DOE Loan Guarantee Program |  | 2,000,000,000 |  |  |
Potential financing from Japanese export credit agencies under discussion |  | 1,000,000,000 |  |  |
Minimum additional financing needed for ACP beyond DOE and Japanese |  | 1,000,000,000 |  |  |
NYSE 30-day average minimum market capitalization |  | 50,000,000 |  |  |
NYSE Minimum 30 Day Average Closing Price |  | $ 1.00 |  |  |
NYSE 30-Day Market Capitalization Subject to Suspension |  | 15,000,000 |  |  |
Stockholders’ Equity (Deficit) |  | (462,100,000) | (472,900,000) | 652,200,000 | 752,400,000
PBGC estimate of potential Portsmouth pension liability |  | 130,000,000 |  |  |
Long-Term Debt |  | $ 530,000,000 | $ 530,000,000 |  |
Minimum Paducah SWU Production Under 2002 DOE-USEC Agreement |  | 3,500,000 |  |  |

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