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Other (Expense) Income, Net (Tables) | 6 Months Ended
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Jun. 30, 2018
Other Income and Expenses [Abstract] |
Other (Expense) 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,
| 2018 |  | 2017 |  | 2018 |  | 2017
Interest income | $ | — |  |  | $ | — |  |  | $ | 0.1 |  |  | $ | — |
Net periodic postretirement benefit cost relating to Salaried VEBA | (1.6 | ) |  | (1.1 | ) |  | (3.1 | ) |  | (2.2 | )
Gain on removal of Union VEBA net assets | — |  |  | — |  |  | — |  |  | 1.3 |
Realized gain on investments | 1.5 |  |  | 0.7 |  |  | 3.1 |  |  | 1.4 |
All other (expense) income, net | (0.4 | ) |  | 0.3 |  |  | (0.5 | ) |  | 0.2 |
Other (expense) income, net | $ | (0.5 | ) |  | $ | (0.1 | ) |  | $ | (0.4 | ) |  | $ | 0.7 |

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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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