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Basis of Presentation (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Sep. 30, 2014
Reduction in amount of third party debt obligations		55.00%
Gain on sale of subsidiary	$ 35.6

X

- Definition

Reduction in amount of third party debt obligations

+ References

No definition available.

+ Details

Name:	leu_Reductioninamountofthirdpartydebtobligations
Namespace Prefix:	leu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

+ References

No definition available.

+ Details

Name:	us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration