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Other (Expense) Income, Net | 12 Months Ended
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Dec. 31, 2016
Other Income and Expenses [Abstract] |
Other Income, Net | Other (Expense) Income, Net Other (expense) income, net consisted of the following for each period presented (in millions of dollars):
| Year Ended December 31,
| 2016 |  | 2015 |  | 2014
Interest income | $ | 0.1 |  |  | $ | 0.4 |  |  | $ | 1.0 |
Unrealized gain on financial derivatives 1 | — |  |  | — |  |  | 3.6 |
Realized gain on investments | 0.8 |  |  | 0.8 |  |  | 1.0 |
Loss on extinguishment of debt 2 | (11.1 | ) |  | — |  |  | — |
All other, net 3 | (0.1 | ) |  | (3.0 | ) |  | 1.1 |
Other (expense) income, net | $ | (10.3 | ) |  | $ | (1.8 | ) |  | $ | 6.7 |
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1. | Reflects our net unrealized gain related to the Option Assets and Bifurcated Conversion Feature, which are discussed in Note 3. See Note 1 for a discussion of our accounting policy for such instruments.
2. | Represents the loss on extinguishment of our 8.25% Senior Notes during the year ended December 31, 2016 which includes an $8.2 million premium paid to redeem the notes and a $2.9 million write-off of unamortized debt issuance costs associated with the notes.
3. | See Note 3 for a discussion of the loss we recognized on our repurchase of 8.25% Senior Notes during the year ended December 31, 2015.

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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=63488584&loc=d3e20235-122688 + Details
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