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Accounts Receivable (Other Table) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accounts Receivable and Other Current Assets
Prepayments to American Centrifuge Suppliers	$ 21.1	$ 34.4
Prepaid taxes, power purchases and insurance	29.4	21.0
Deferred financing costs for credit facility	2.4	7.4
Other current assets	11.9	8.8
Other current assets, total	$ 64.8	$ 71.6

The total of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer, and the aggregate carrying amount of current assets, as of the balance sheet date, not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

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