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Deferred Revenue and Advances From Customers
6 Months Ended
Jun. 30, 2011
Deferred Revenue and Advances from Customers  
Deferred Revenue and Advances From Customers
5. DEFERRED REVENUE AND ADVANCES FROM CUSTOMERS

   
June 30,
2011
   
December 31,
2010
 
   
(millions)
 
Deferred revenue
  $ 158.5     $ 176.1  
Advances from customers
    30.0       3.0  
    $ 188.5     $ 179.1  
                 
Deferred costs associated with deferred revenue
  $ 152.5     $ 152.9  


Advances from customers included $26.9 million as of June 30, 2011 and $1.2 million as of December 31, 2010 for services to be provided for DOE in our contract services segment. DOE funded this work through an arrangement whereby DOE transferred uranium to USEC which USEC immediately sold in the market.