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Other (Expense) Income, Net - Components of Other income, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Other Income and Expenses [Abstract] |  |  |  |  |
Interest income |  | $ 1.2 | $ 0.2 | $ 2.1 | $ 0.6
Net periodic postretirement benefit cost |  | (1.5) | (1.9) | (1.8) | (3.9)
Unrealized gain on equity securities |  | 0.1 | 0.2 | 0.3 | 0.3
(Loss) gain on disposition of property, plant and equipment |  | (0.3) | (0.8) | (0.5) | 14.2
Gain on business interruption insurance recoveries | [1] | 0.0 | 0.0 | 10.5 | 0.0
All other, net |  | 0.0 | (0.2) | (0.2) | (0.1)
Other (expense) income, net |  | $ (0.5) | $ (2.5) | $ 10.4 | $ 11.1
[1] | Represents advances against business interruption insurance claims received by the Company as of June 30, 2024. We recognize such advances in the period in which the insurance proceeds are received or become realizable.

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483605/220-30-50-1 + Details
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