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Goodwill and Other Intangibles (Tables) | 12 Months Ended
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Sep. 30, 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 years ended September 30, 2019 and 2018.
|  | Specialty |  |  | Intermediates |  |  |  |  |
(In millions) |  | Ingredients |  |  | and Solvents (a) |  |  | Total |
Balance at September 30, 2017 |  | $ | 2,315 |  |  | $ | — |  |  | $ | 2,315 |
Acquisition (b) |  |  | 5 |  |  |  | — |  |  |  | 5 |
Currency translation |  |  | (16 | ) |  |  | — |  |  |  | (16 | )
Balance at September 30, 2018 |  |  | 2,304 |  |  |  | — |  |  |  | 2,304 |
Currency translation |  |  | (51 | ) |  |  | — |  |  |  | (51 | )
Balance at September 30, 2019 |  | $ | 2,253 |  |  | $ | — |  |  | $ | 2,253 |
(a) | As of September 30, 2019 and 2018, there was accumulated impairment of $90 million related to the Intermediates and Solvents reportable segment.
(b) | Relates to the acquisition of Pharmachem during 2017 and Vornia Limited during 2018. See Note C for more information.
Summary of Other Intangible Assets | Other intangible assets were comprised of the following as of September 30, 2019 and 2018.
|  | 2019 |  |  | 2018 |
|  | Gross |  |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  |  | Net |
|  | carrying |  |  | Accumulated |  |  | carrying |  |  | carrying |  |  | Accumulated |  |  | carrying |
(In millions) |  | amount |  |  | amortization |  |  | amount |  |  | amount |  |  | amortization |  |  | amount |
Definite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  | $ | 66 |  |  | $ | (29 | ) |  | $ | 37 |  |  | $ | 66 |  |  | $ | (25 | ) |  | $ | 41 |
Intellectual property |  |  | 712 |  |  |  | (391 | ) |  |  | 321 |  |  |  | 721 |  |  |  | (350 | ) |  |  | 371 |
Customer and supplier relationships |  |  | 744 |  |  |  | (292 | ) |  |  | 452 |  |  |  | 759 |  |  |  | (264 | ) |  |  | 495 |
Total definite-lived intangible assets |  |  | 1,522 |  |  |  | (712 | ) |  |  | 810 |  |  |  | 1,546 |  |  |  | (639 | ) |  |  | 907 |
Indefinite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  |  | 278 |  |  |  | — |  |  |  | 278 |  |  |  | 278 |  |  |  | — |  |  |  | 278 |
Total intangible assets |  | $ | 1,800 |  |  | $ | (712 | ) |  | $ | 1,088 |  |  | $ | 1,824 |  |  | $ | (639 | ) |  | $ | 1,185 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite and infinite life, by major class. + References No definition available. + Details
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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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