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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Balances | The carrying amount of goodwill attributable to each reportable segment and the changes in those balances during the nine months ended June 30, 2024 are as follows:
|  | Reinforcement Materials |  |  | Performance Chemicals |  |  | Total |
|  | (In millions) |
Balance at September 30, 2023 |  | $ | 51 |  |  | $ | 83 |  |  | $ | 134 |
Foreign currency impact |  |  | (2 | ) |  |  | — |  |  |  | (2 | )
Balance at June 30, 2024 |  | $ | 49 |  |  | $ | 83 |  |  | $ | 132 |
Schedule of Intangible Assets | The following table provides information regarding the Company’s intangible assets:
|  | June 30, 2024 |  |  | September 30, 2023 |
|  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Intangible Assets |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Intangible Assets |
|  | (In millions) |
Intangible assets with finite lives |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technologies |  | $ | 33 |  |  | $ | (11 | ) |  | $ | 22 |  |  | $ | 34 |  |  | $ | (10 | ) |  | $ | 24 |
Trademarks |  |  | 2 |  |  |  | (1 | ) |  |  | 1 |  |  |  | 2 |  |  |  | (1 | ) |  |  | 1 |
Customer relationships |  |  | 63 |  |  |  | (31 | ) |  |  | 32 |  |  |  | 65 |  |  |  | (30 | ) |  |  | 35 |
Total intangible assets |  | $ | 98 |  |  | $ | (43 | ) |  | $ | 55 |  |  | $ | 101 |  |  | $ | (41 | ) |  | $ | 60 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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