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Deferred Revenue and Advances From Customers
12 Months Ended
Dec. 31, 2011
Deferred Revenue and Advances from Customers  
Deferred Revenue and Advances From Customers
6. DEFERRED REVENUE AND ADVANCES FROM CUSTOMERS

   
December 31,
 
   
2011
   
2010
 
   
(millions)
 
Deferred revenue
  $ 181.5     $ 176.1  
Advances from customers
    23.7       3.0  
    $ 205.2     $ 179.1  
                 
Deferred costs associated with deferred revenue
  $ 175.5     $ 152.9  


Advances from customers included $22.3 million as of December 31, 2011 and $1.2 million as of December 31, 2010 for services to be provided for DOE or to be applied to existing receivables balances due from DOE in USEC's contract services segment. DOE funded this work through an arrangement whereby DOE transferred uranium to USEC which USEC immediately sold in the market.