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Debt | 6 Months Ended
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Jun. 30, 2013
Line of Credit Facility [Abstract] |
Debt | DEBT Credit Facility On March 14, 2013, USEC amended its credit facility that was scheduled to mature on May 31, 2013. The amended revolving credit facility totals $110.0 million (including letters of credit of up to $25.0 million) and matures on September 30, 2013. The term loan under the credit facility was repaid in connection with the amendment. Utilization of the credit facility at June 30, 2013 and December 31, 2012 follows:
| June 30, 2013 |  | December 31, 2012
| (millions)
Borrowings under the revolving credit facility | $ | — |  |  | $ | — |
Term loan | — |  |  | 83.2 |
Letters of credit | 3.1 |  |  | 14.7 |
Available credit | 76.9 |  |  | 87.1 |
As of June 30, 2013, USEC met all of the reserve provision and collateral requirements of the credit facility and was in compliance with all of the covenants. The credit facility is secured by assets of USEC Inc. and its subsidiaries, excluding equity in, and assets of, subsidiaries created to carry out future commercial American Centrifuge activities. Borrowings under the credit facility are subject to limitations based on established percentages of eligible accounts receivable and USEC-owned inventory pledged as collateral to the lenders. The amended credit facility requires cash collateralization of letters of credit issued by the bank at 105%. Cash collateralization of $3.3 million as of June 30, 2013 is classified as restricted cash. Available credit reflects the levels of qualifying assets at the end of the previous month less any borrowings or letters of credit. The credit facility is available to finance working capital needs and general corporate purposes. The credit facility imposes limitations and restrictions on USEC’s ability to invest in the American Centrifuge project. With certain exceptions, all funds of USEC Inc. and its subsidiaries are subject to full cash dominion, meaning that they will be swept on a daily basis into an account with the administrative agent and will be used to pay outstanding loans before they are available to USEC for use in its operations. The credit facility contains various reserve provisions that reduce available borrowings under the facility periodically including a permanent availability block equal to $30.0 million. The other reserves under the revolving credit facility, such as availability reserves and borrowing base reserves, are customary for credit facilities of this type. Convertible Senior Notes due 2014 Convertible senior notes amounted to $530.0 million as of June 30, 2013 and December 31, 2012. The convertible senior notes are due October 1, 2014. Interest of 3.0% is payable semi-annually in arrears on April 1 and October 1 of each year. The notes were not eligible for conversion to common stock as of June 30, 2013 or December 31, 2012. Deferred Financing Costs Financing costs are generally deferred and amortized over the life of the instrument. A summary of deferred financing costs for the three months ended June 30, 2013 follows (in millions):
| December 31, 2012 |  | Additions |  | Reductions |  | June 30, 2013
Other current assets: |  |  |  |  |  |  |
Bank credit facilities | $ | 3.0 |  |  | $ | 2.1 |  |  | $ | (4.1 | ) |  | $ | 1.0 |
Deferred financing costs (long-term): |  |  |  |  |  |  |  |  |  |  |
Convertible notes | $ | 3.6 |  |  | $ | — |  |  | $ | (1.0 | ) |  | $ | 2.6 |

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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