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Other Expense, Net (Tables) | 3 Months Ended
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Mar. 31, 2022
Other Income And Expenses [Abstract] |
Other Expense, Net | Other expense, net, consisted of the following (in millions of dollars):
|  | Quarter Ended March 31, |
|  | 2022 |  |  | 2021 |
Interest income |  | $ | — |  |  | $ | 0.1 |
Net periodic postretirement benefit cost |  |  | (1.4 | ) |  |  | (0.6 | )
Unrealized loss on equity securities |  |  | (0.4 | ) |  |  | (0.1 | )
All other, net |  |  | 0.2 |  |  |  | 0.2 |
Other expense, net |  | $ | (1.6 | ) |  | $ | (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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