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Goodwill and Other Intangibles - Summary of Goodwill by Reportable Segment (Details) $ in Millions | 3 Months Ended
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Dec. 31, 2018 USD ($)
Goodwill [Roll Forward] |  |
Balance at beginning of period | $ 2,304 |
Acquisitions | 0 |
Currency translation | (15) |
Balance at end of period | 2,289 |
Specialty Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 2,304 |
Acquisitions | 0 |
Currency translation | (15) |
Balance at end of period | 2,289 |
Intermediates and Solvents [Member] |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 0 | [1]
Acquisitions | 0 | [1]
Currency translation | 0 | [1]
Balance at end of period | $ 0 | [1]
[1] | As of December 31, 2018 and September 30, 2018, there was accumulated impairment of $90 million related to the Intermediates and Solvents reportable segment.

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + 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 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + 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 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Details
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- Details
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