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Segment Information (Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Revenues [Abstract] |  |  |  |
Separative work units | $ 97.4 | $ 295.8 | $ 347.5 | $ 853.4
Uranium | 0 | 3.8 | 0 | 45.3
Revenue from low enriched uranium segment | 97.4 | 299.6 | 347.5 | 898.7
Contract services | 23.3 | 4.2 | 43.0 | 10.3
Total revenue | 120.7 | 303.8 | 390.5 | 909.0
LEU segment gross profit | (5.9) | (30.8) | (21.9) | (63.7)
Contract services segment gross profit | 0.5 | 0.8 | (0.9) | 0.1
Gross profit | $ (5.4) | $ (30.0) | $ (22.8) | $ (63.6)

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