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Other Income (Expense), Net | 3 Months Ended
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Mar. 31, 2023
Other Income and Expenses [Abstract] |
Other Income (Expense), Net | 9. Other Income (Expen se), Net The following table presents the components of Other income (expense), net (in millions of dollars):
|  | Quarter Ended March 31, |
|  | 2023 |  |  | 2022 |
Interest income |  | $ | 0.4 |  |  | $ | — |
Net periodic postretirement benefit cost |  |  | (2.0 | ) |  |  | (1.4 | )
Unrealized gain (loss) on equity securities |  |  | 0.1 |  |  |  | (0.4 | )
Gain on disposition of property, plant and equipment |  |  | 15.0 |  |  |  | — |
All other, net |  |  | 0.1 |  |  |  | 0.2 |
Other income (expense), net |  | $ | 13.6 |  |  | $ | (1.6 | )
Supply Chain Financing. We are party to several supply chain financing arrangements, in which we may sell certain of our customers’ trade accounts receivable to such customers’ financial institutions without recourse. During the quarters ended March 31, 2023 and March 31, 2022, we sold trade accounts receivable totaling $303.2 million and $407.4 million, respectively, related to these supply chain financing arrangements, of which our customers’ financial institutions applied discount fees totaling $7.2 million and $2.9 million, respectively. As of March 31, 2023, we had been and/or expected to be fully reimbursed by our customers for the majority of these discount fees.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI https://asc.fasb.org/topic&trid=2122503 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI https://asc.fasb.org/topic&trid=49130413 + Details
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