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Segment Information (Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Revenues [Abstract] |  |  |  |
Separative work units | $ 295.8 | $ 559.5 | $ 853.4 | $ 1,444.6
Uranium | 3.8 | 0 | 45.3 | 3.6
Revenue from low enriched uranium segment | 299.6 | 559.5 | 898.7 | 1,448.2
Contract services | 4.2 | 3.5 | 10.3 | 10.6
Total Revenue | 303.8 | 563.0 | 909.0 | 1,458.8
LEU segment gross profit | (30.8) | 36.7 | (63.7) | 83.8
Contract services segment gross profit | 0.8 | (0.1) | 0.1 | (0.3)
Gross profit | $ (30.0) | $ 36.6 | $ (63.6) | $ 83.5

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- Definition Revenue earned during the period arising from products sold or services provided under the terms of a contract, not elsewhere specified in the taxonomy. May include government contracts, construction contracts, and any other contract related to a particular project or product. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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