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Transition Charges (Narrative)(Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Direct charges | $ 23.9 | $ 17.5 | $ 32.5 | $ 66.7
Operating expenses | 2.3 | 15.6 | 10.6 | 51.3
Inventory valuation adjustments |  | 1.8 | 0.3 | 13.5
Plant asset depreciation charges |  | $ 0.1 |  | $ 1.9
Termination benefit costs |  |  | 13.6 |
DOE Share of Paducah Termination Benefit Costs |  |  | 0.3 |
Cost of Sales [Member] |  |  |  |
Actuarial (gain) loss from remeasurement, net | 21.6 |  | 21.6 |
Contract Reduction [Member] |  |  |  |
Termination benefit costs | 8.7 |  |  |
Other Restructuring [Member] |  |  |  |
Termination benefit costs | $ 1.1 |  | $ 4.9 |

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- Definition The expense recognized in the current period that allocates the cost of a tangible asset over the asset's useful life. This element applies only to an asset used in the production of goods sold. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Gain or Loss -URI http://asc.fasb.org/extlink&oid=49168827 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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