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Other Income (Expense), Net | 6 Months Ended
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Jun. 30, 2020
Other Income And Expenses [Abstract] |
Other Income (Expense), Net | 10. Other Income (Expense), Net Other income (expense), net, consisted of the following for the periods presented (in millions of dollars):
|  | Quarter Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Interest income |  | $ | 0.2 |  |  | $ | 0.1 |  |  | $ | 0.3 |  |  | $ | 0.3 |
Net periodic postretirement benefit cost relating to Salaried VEBA |  |  | (1.2 | ) |  |  | (1.6 | ) |  |  | (2.4 | ) |  |  | (3.3 | )
Realized gain on available for sale securities |  |  | 0.6 |  |  |  | 1.2 |  |  |  | 2.1 |  |  |  | 2.4 |
Unrealized gain on equity securities |  |  | 0.7 |  |  |  | — |  |  |  | 0.1 |  |  |  | 0.5 |
All other income (expense), net |  |  | 0.2 |  |  |  | 0.2 |  |  |  | (0.4 | ) |  |  | 0.5 |
Other income (expense), net |  | $ | 0.5 |  |  | $ | (0.1 | ) |  | $ | (0.3 | ) |  | $ | 0.4 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI http://asc.fasb.org/topic&trid=2122503 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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