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Segment Information
 3 Months Ended
Mar. 31, 2014
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Segment Information
SEGMENT INFORMATION

USEC has two reportable segments: the LEU segment with two components, SWU and uranium, and the contract services segment. The LEU segment is USEC’s primary business focus and includes sales of the SWU component of LEU, sales of both the SWU and uranium components of LEU, and sales of uranium. The contract services segment consists of work performed for DOE and DOE contractors at the Portsmouth site and the Paducah GDP.  Gross profit is USEC’s measure for segment reporting. There were no intersegment sales in the periods presented.
 
Three Months Ended 
 March 31,
 
2014
 
2013
 
(millions)
Revenue
 
 
 
LEU segment:
 
 
 
Separative work units
$
145.6

 
$
290.2

Uranium
—

 
27.6

 
145.6

 
317.8

Contract services segment
3.0

 
2.6

 
$
148.6

 
$
320.4

 
 
 
 
Segment Gross Profit (Loss)
 

 
 

LEU segment
$
(19.7
)
 
$
14.0

Contract services segment
(1.2
)
 
(0.7
)
Gross profit (loss)
$
(20.9
)
 
$
13.3