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Advanced Technology Costs and Other Income (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015
Maximum RD&D Program Funding by DOE		$ 280.0
RD&D Program Funding by DOE		80.00%
RD&D Program Funding by USEC		20.00%
Other advanced technology costs	$ 4.0	$ 7.0	$ 5.8

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- Definition

Maximum RD&D Program Funding by DOE

+ References

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RD&D Program Funding by DOE

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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

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