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Other Income, Net (Tables) | 12 Months Ended
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Dec. 31, 2024
Other Income and Expenses [Abstract] |
Other Income, Net | The following table presents the components of Other income, net, (in millions of dollars):
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Interest income |  | $ | 3.6 |  |  | $ | 1.7 |  |  | $ | 1.3 |
Net periodic postretirement and postemployment benefit cost |  |  | (4.3 | ) |  |  | (8.4 | ) |  |  | (5.6 | )
Unrealized gain (loss) on equity securities |  |  | 0.3 |  |  |  | 0.6 |  |  |  | (1.2 | )
Gain on disposition of property, plant and equipment |  |  | 3.8 |  |  |  | 13.8 |  |  |  | 6.0 |
Gain on business interruption insurance recoveries 1 |  |  | 16.3 |  |  |  | — |  |  |  | — |
Post-acquisition funding received from Alcoa Corporation 2 |  |  | — |  |  |  | — |  |  |  | 6.0 |
All other, net |  |  | (0.2 | ) |  |  | (0.3 | ) |  |  | (0.1 | )
Other income, net |  | $ | 19.5 |  |  | $ | 7.4 |  |  | $ | 6.4 |
1. Represents advances against business interruption insurance claims. We recognize such advances in the period in which the insurance proceeds are received or become realizable. As of December 31, 2024 we received net cash proceeds of $15.9 million. 2. Represents reimbursement received for repairs and maintenance expenditures on certain machinery and equipment that we had purchased from Alcoa in connection with our March 31, 2021 acquisition of Warrick.

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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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