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Deferred Revenue and Advances from Customers (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Advances from customers | $ 65.4 | $ 65.4 |  | $ 23.7
Other (income) | 34.6 | 44.6 | 3.7 |
DOE contract services [Member] |  |  |  |
Advances from customers | 20.6 | 20.6 |  | 22.3
DOE advanced technology [Member] |  |  |  |
Advances from customers | 43.1 | 43.1 |  |
DOE initial RD&D Program funding |  | 87.7 |  |
Cash collateral deposits received |  | 55.6 |  |
Cash collateral deposits expected to be received |  | 32.1 |  |
Qualifying expenditures for RD&D Program |  | 55.7 |  |
Other (income) |  | $ 44.6 |  |

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- Definition The current portion of prepayments received from customers for goods or services to be provided in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The total amount of other operating income, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Cash collateral deposits expected to be received + References No definition available. + Details
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- Definition DOE initial RD&D Program funding + References No definition available. + Details
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- Definition Qualifying expenditures for RD&D Program + References No definition available. + Details
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