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Accounts Receivable and Other Current Assets | 12 Months Ended
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Dec. 31, 2012
Accounts Receivable and Other Current Assets |
Accounts Receivable and Other Current Assets | 2. ACCOUNTS RECEIVABLE AND OTHER CURRENT ASSETS
|  | December 31, |
|  | 2012 |  |  | 2011 |
|  | (millions) |
Accounts receivable: |  |  |
Utility customers |  | $ | 118.3 |  |  | $ | 124.2 |
Contract services, primarily Department of Energy: |  |  |  |  |  |  |  |
Billed revenue |  |  | 10.5 |  |  |  | 18.8 |
Unbilled revenue |  |  | 6.0 |  |  |  | 19.0 |
|  |  | 16.5 |  |  |  | 37.8 |
|  | $ | 134.8 |  |  | $ | 162.0 |
Other current assets: |  |  |  |  |  |
Prepayments to American Centrifuge suppliers |  | $ | - |  |  | $ | 21.1 |
Prepaid taxes, power purchases and insurance |  |  | 4.0 |  |  |  | 29.4 |
Deferred financing costs for credit facility |  |  | 3.0 |  |  |  | 2.4 |
Other |  |  | 12.2 |  |  |  | 11.9 |
|  | $ | 19.2 |  |  | $ | 64.8 |
Billings for contract services related to DOE are generally invoiced based on provisional billing rates approved by DOE. Unbilled revenue represents the difference between actual costs incurred, prior to incurred cost audit and notice by DOE authorizing final billing, and provisional billing rate invoiced amounts. Current accounts receivable are net of valuation allowances and allowances for doubtful accounts totaling $2.1 million at December 31, 2012 and $13.7 million at December 31, 2011. Certain receivables from DOE of $25.8 million, net of valuation allowances, were reclassified from current assets to other long-term assets in 2012 based on the extended timeframe expected to resolve claims for payment filed by USEC under the Contract Disputes Act. Additional details are provided in Note 5. Unbilled revenue of $4.4 million as of December 31, 2012 represents the balance of DOE's pro-rata share of funding for American Centrifuge expenditures in 2012. Additional details are provided in Note 18 under "American Centrifuge Plant – Project Funding." As of December 31, 2012, prepayments to American Centrifuge suppliers of $9.9 million were charged to expense. Additional details are provided in Note 4.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 3: 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=7512638&loc=d3e5074-111524 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=7512638&loc=d3e5162-111524 Reference 5: 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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Article 4 Reference 7: 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 8: 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=7512638&loc=d3e5066-111524 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 + Details
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