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Other (Expense) Income, Net (Tables) | 6 Months Ended
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Jun. 30, 2019
Other Income and Expenses [Abstract] |
Other Income, Net | Other (expense) income, net, consisted of the following for each period presented (in millions of dollars):
| Quarter Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Interest income | $ | 0.1 |  |  | $ | — |  |  | $ | 0.3 |  |  | $ | 0.1 |
Net periodic postretirement benefit cost relating to Salaried VEBA | (1.6 | ) |  | (1.6 | ) |  | (3.3 | ) |  | (3.1 | )
Realized gain on available for sale securities | 1.2 |  |  | 1.5 |  |  | 2.4 |  |  | 3.1 |
Unrealized (loss) gain on equity securities | — |  |  | (0.4 | ) |  | 0.5 |  |  | (0.4 | )
All other income (expense), net | 0.2 |  |  | — |  |  | 0.5 |  |  | (0.1 | )
Other (expense) income, net | $ | (0.1 | ) |  | $ | (0.5 | ) |  | $ | 0.4 |  |  | $ | (0.4 | )

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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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