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Other Income (Expense), Net | 6 Months Ended
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Jun. 30, 2015
Other Income and Expenses [Abstract] |
Other Income (Expense), Net | Other Income, Net Other income, net consisted of the following, for each period presented (in millions of dollars):
| Quarter Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Interest income | $ | — |  |  | $ | 0.2 |  |  | $ | 0.2 |  |  | $ | 0.5 |
Unrealized gains on financial derivatives 1 | — |  |  | 0.5 |  |  | — |  |  | 1.4 |
Realized gains on investments | 0.2 |  |  | 0.2 |  |  | 0.5 |  |  | 0.4 |
All other, net | 0.2 |  |  | 0.9 |  |  | 0.1 |  |  | 1.4 |
Other income, net | $ | 0.4 |  |  | $ | 1.8 |  |  | $ | 0.8 |  |  | $ | 3.7 |
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1 | See "Hedges Relating to the Convertible Notes" in Note 8 for discussion of such instruments.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + 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 210.5-03.3,6,7,9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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