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Document and Entity Information	9 Months Ended
	Sep. 30, 2011	Oct. 31, 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	Sep. 30, 2011
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		121,988,404
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3

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The type of document being provided (such as 10-K, 10-Q, N-1A, etc). The document type is limited to the same value as the supporting SEC submission type, minus any "/A" suffix. The acceptable values are as follows: S-1, S-3, S-4, S-11, F-1, F-3, F-4, F-9, F-10, 6-K, 8-K, 10, 10-K, 10-Q, 20-F, 40-F, N-1A, 485BPOS, 497, NCSR, N-CSR, N-CSRS, N-Q, 10-KT, 10-QT, 20-FT, and Other.

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Document and Entity Information

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