18. Other Income (Expense), net Other income (expense), net for the years ended December 31, 2025, 2024 and 2023 included the following: | | | | | | | | | | | | | 2025 | | 2024 | | 2023 | | Goodwill impairment (see Note 7) | | $ | | | $ | | | $ | (445) | | Restructuring, asset impairment and other charges | | | (443) | | | (206) | | | (100) | | Pension settlement and curtailment charges (see Note 11) | | | (5) | | | (5) | | | (19) | | Legacy environmental charge (see Note 15) | | | (4) | | | (11) | | | | | Gain on sale of divested businesses and miscellaneous assets (see Note 21) | | | 5 | | | 6 | | | 4 | | Intangible amortization expense | | | (27) | | | (29) | | | (32) | | Royalty income | | | 17 | | | 21 | | | 24 | | Foreign currency exchange loss | | | (6) | | | 1 | | | (4) | | Other income (expense), net | | | 3 | | | (3) | | | (10) | | | | $ | (460) | | $ | (226) | | $ | (582) | |
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