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Other Income (Expense), Net (Tables) | 9 Months Ended
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Sep. 30, 2015
Other Income and Expenses [Abstract] |
Other Income (Expense), Net | Other income, net consisted of the following for each period presented (in millions of dollars):
| Quarter Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Interest income | $ | 0.1 |  |  | $ | 0.3 |  |  | $ | 0.3 |  |  | $ | 0.8 |
Unrealized gains on financial derivatives 1 | — |  |  | 2.2 |  |  | — |  |  | 3.6 |
Realized gains on investments | — |  |  | — |  |  | 0.5 |  |  | 0.4 |
All other (expense) income, net | (1.0 | ) |  | (0.3 | ) |  | (0.9 | ) |  | 1.1 |
Other (expense) income, net | $ | (0.9 | ) |  | $ | 2.2 |  |  | $ | (0.1 | ) |  | $ | 5.9 |
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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 Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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