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Interest Income, Expense and Other Financing Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Interest Income, Expense and Other Financing Costs |  |  |  |
Interest income | $ 1.3 | $ 1.5 | $ 2.6 | $ 3.1
Interest expense and other financing costs | (7.7) | (6.2) | (16.3) | (12.1)
Interest expense and other financing costs, net | $ (6.4) | $ (4.7) | $ (13.7) | $ (9.0)

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- Definition Represents the amount of interest income and expense, net, which includes other financing costs. + References No definition available. + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 + Details
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- Definition Amount of interest income earned from interest bearing assets not separately disclosed. + References No definition available. + Details
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