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Debt (Schedule of Deferred Financing Costs) (Details) (USD $) In Millions, unless otherwise specified |  |  | 6 Months Ended
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Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2012 Bank credit facilities [Member] | Jun. 30, 2012 Convertible notes [Member] | Jun. 30, 2012 ACP project [Member] | Jun. 30, 2012 Deferred financing costs [Member]
Deferred Finance Costs, Beginning Balance | $ 11.2 | $ 12.2 | $ 2.4 | $ 5.5 | $ 6.7 | $ 12.2
Deferred financing costs, additions |  |  | 9.2 |  |  |
Deferred financing costs, reductions |  |  | (5.0) | (0.9) | (0.1) | (1.0)
Deferred Finance Costs, End Balance | $ 11.2 | $ 12.2 | $ 6.6 | $ 4.6 | $ 6.6 | $ 11.2

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- Definition Net amount of long-term deferred finance costs capitalized at the end of the reporting period. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 + Details
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- Definition Deferred financing costs, additions + References No definition available. + Details
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- Definition Deferred financing costs, amortization + References No definition available. + Details
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