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Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Jul. 29, 2011
Document and Entity Information
Entity Registrant Name	USEC INC
Entity Central Index Key	0001065059
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		121,978,453
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation 12B
-Number 240
-Section 12b
-Subsection 1

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Document and Entity Information

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