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Advanced Technology Costs and Other Income (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Research and Development [Abstract] |  |  |  |
Maximum RD&D Program Funding by DOE |  |  |  | $ 280.0
RD&D Program Funding by DOE |  |  |  | 80.00%
Other advanced technology costs | $ 1.9 | $ 5.3 | $ 7.7 | $ 12.3

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- Definition Amount of other research and development expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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