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Deferred Revenue and Advances From Customers | 6 Months Ended
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Jun. 30, 2013
Deferred Revenue and Credits, Current [Abstract] |
Deferred Revenue and Advances From Customers | DEFERRED REVENUE AND ADVANCES FROM CUSTOMERS
| June 30, 2013 |  | December 31, 2012
| (millions)
Deferred revenue | $ | 143.3 |  |  | $ | 123.1 |
Advances from customers | 21.7 |  |  | 2.4 |
| $ | 165.0 |  |  | $ | 125.5 |
Deferred costs associated with deferred revenue | $ | 118.7 |  |  | $ | 116.8 |
Advances from customers as of June 30, 2013 consists of the balance of funding provided by DOE for the RD&D program. Details are provided in Note 4.

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- Definition The entire disclosure for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6935-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.3(b).Q1(c),(b).Q2,(c).Q3) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 5 -Paragraph 83, 84 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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