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Goodwill and Other Intangibles (Tables) | 3 Months Ended
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Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract] |
Summary of Goodwill by Reportable Segment | The following is a progression of goodwill by reportable segment for the three months ended December 31, 2019.
| Specialty |  |  | Intermediates |  |  |  |  |
(In millions) | Ingredients |  |  | and Solvents |  | (a) | Total |
Balance at September 30, 2019 | $ | 2,253 |  |  | $ | — |  |  | $ | 2,253 |
Currency translation |  | 21 |  |  |  | — |  |  |  | 21 |
Balance at December 31, 2019 | $ | 2,274 |  |  | $ | — |  |  | $ | 2,274 |
| (a) | As of December 31, 2019 and September 30, 2019, there was accumulated impairment of $90 million related to the Intermediates and Solvents reportable segment. |
Summary of Intangible Assets | Intangible assets were comprised of the following as of December 31, 2019 and September 30, 2019.
| December 31, 2019 |
| Gross |  |  |  |  |  |  | Net |
| carrying |  |  | Accumulated |  |  | carrying |
(In millions) | amount |  |  | amortization |  |  | amount |
Definite-lived intangibles |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names | $ | 66 |  |  | $ | (30 | ) |  | $ | 36 |
Intellectual property |  | 717 |  |  |  | (405 | ) |  |  | 312 |
Customer and supplier relationships |  | 750 |  |  |  | (304 | ) |  |  | 446 |
Total definite-lived intangibles |  | 1,533 |  |  |  | (739 | ) |  |  | 794 |
Indefinite-lived intangibles |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  | 278 |  |  |  | — |  |  |  | 278 |
Total intangible assets | $ | 1,811 |  |  | $ | (739 | ) |  | $ | 1,072 |
| September 30, 2019 |
| Gross |  |  |  |  |  |  | Net |
| carrying |  |  | Accumulated |  |  | carrying |
(In millions) | amount |  |  | amortization |  |  | amount |
Definite-lived intangibles |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names | $ | 66 |  |  | $ | (29 | ) |  | $ | 37 |
Intellectual property |  | 712 |  |  |  | (391 | ) |  |  | 321 |
Customer and supplier relationships |  | 744 |  |  |  | (292 | ) |  |  | 452 |
Total definite-lived intangibles |  | 1,522 |  |  |  | (712 | ) |  |  | 810 |
Indefinite-lived intangibles |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  | 278 |  |  |  | — |  |  |  | 278 |
Total intangible assets | $ | 1,800 |  |  | $ | (712 | ) |  | $ | 1,088 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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