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Inventories (Tables)
9 Months Ended
Sep. 30, 2015
Inventory, Net [Abstract]  
Schedule of Inventories
Components of inventories follow (in millions):
 
September 30, 2015
 
December 31, 2014
 
Current
Assets
 
Current
Liabilities
(a)
 
Inventories, Net
 
Current
Assets
 
Current
Liabilities
(a)
 
Inventories, Net
Separative work units
$
218.4

 
$
37.4

 
$
181.0

 
$
330.6

 
$
76.6

 
$
254.0

Uranium
39.2

 
32.0

 
7.2

 
131.4

 
82.3

 
49.1

Materials and supplies
0.2

 

 
0.2

 
0.2

 

 
0.2

 
$
257.8

 
$
69.4

 
$
188.4

 
$
462.2

 
$
158.9

 
$
303.3



(a)
Inventories owed to customers and suppliers, included in current liabilities, consist primarily of SWU and uranium inventories owed to fabricators.