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Accounts Receivable and Other Current Assets | 12 Months Ended
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Dec. 31, 2011
Accounts Receivable and Other Current Assets |
Accounts Receivable and Other Current Assets | 2. ACCOUNTS RECEIVABLE AND OTHER CURRENT ASSETS
|  | December 31, |
|  | 2011 |  |  | 2010 |
|  | (millions) |
Accounts receivable (1): |  |  |
Utility customers |  | $ | 124.2 |  |  | $ | 249.5 |
Contract services, primarily Department of Energy (2): |  |  |  |  |  |  |  |
Billed revenue |  |  | 18.8 |  |  |  | 34.8 |
Unbilled revenue |  |  | 19.0 |  |  |  | 24.3 |
|  |  | 37.8 |  |  |  | 59.1 |
|  | $ | 162.0 |  |  | $ | 308.6 |
|  | December 31, |
|  | 2011 |  |  | 2010 |
|  | (millions) |
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 |  |  | 11.9 |  |  |  | 8.8 |
|  | $ | 64.8 |  |  | $ | 71.6 |
(1) | Accounts receivable are net of valuation allowances and allowances for doubtful accounts totaling $13.7 million at December 31, 2011 and $18.6 million at December 31, 2010.
(2) | Billings for contract services related to DOE are invoiced based on provisional billing rates approved by DOE. Unbilled revenue represents the difference between actual costs incurred, prior to DCAA audit and notice by DOE authorizing final billing, and provisional billing rate invoiced amounts. USEC expects to invoice and collect the unbilled amounts as billing rates are revised, submitted to and approved by DOE.

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- Definition The entire disclosure for claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5066-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5162-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph k Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5074-111524 + Details
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