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Deferred Revenue and Advances From Customers
12 Months Ended
Dec. 31, 2012
Deferred Revenue and Advances from Customers  
Deferred Revenue and Advances From Customers
7. DEFERRED REVENUE AND ADVANCES FROM CUSTOMERS

December 31,
2012
2011
(millions)
Deferred revenue
$ 123.1 $ 181.5
Advances from customers
2.4 23.7
$ 125.5 $ 205.2
Deferred costs associated with deferred revenue
$ 116.8 $ 175.5

Advances from customers included $22.3 million as of December 31, 2011 for services to be provided to 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 between the fourth quarter of 2009 and the first quarter of 2011, which USEC immediately sold in the market. As of December 31, 2012, the remaining balance of $20.5 million is included in other long-term liabilities pending resolution of long-term receivables from DOE described in Note 5.