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Goodwill and Other Intangibles - Summary of Goodwill by Reportable Segment (Details) $ in Millions	9 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 2,304
Acquisitions	0
Currency translation	(19)
Balance at end of period	2,285
Specialty Ingredients [Member]
Goodwill [Roll Forward]
Balance at beginning of period	2,304
Acquisitions	0
Currency translation	(19)
Balance at end of period	2,285
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 June 30, 2019 and September 30, 2018, there was accumulated impairment of $90 million related to the Intermediates and Solvents reportable segment.

X

- 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
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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.

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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

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-SubTopic 20
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