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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Sales	$ 574	$ 641	$ 1,717	$ 1,884
Life Sciences [Member]
Disaggregation Of Revenue [Line Items]
Sales	189	190	528	556
Life Sciences [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	58	67	166	193
Life Sciences [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	62	60	174	170
Life Sciences [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	50	45	135	140
Life Sciences [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	19	18	53	53
Personal Care & Household [Member]
Disaggregation Of Revenue [Line Items]
Sales	155	158	451	495
Personal Care & Household [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	42	44	133	135
Personal Care & Household [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	65	68	190	217
Personal Care & Household [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	28	28	74	83
Personal Care & Household [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	20	18	54	60
Specialty Additives [Member]
Disaggregation Of Revenue [Line Items]
Sales	135	177	429	494
Specialty Additives [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	50	59	148	165
Specialty Additives [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	48	68	157	180
Specialty Additives [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	29	42	97	120
Specialty Additives [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	8	8	27	29
Performance Adhesives [Member]
Disaggregation Of Revenue [Line Items]
Sales	70	88	229	258
Performance Adhesives [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	59	76	196	220
Performance Adhesives [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	8	8	24	27
Performance Adhesives [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	2	2	5	5
Performance Adhesives [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	1	2	4	6
Intermediates and Solvents [Member]
Disaggregation Of Revenue [Line Items]
Sales	37	41	102	118
Intermediates and Solvents [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	21	28	59	78
Intermediates and Solvents [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	6	5	17	16
Intermediates and Solvents [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	8	7	21	20
Intermediates and Solvents [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	$ 2	$ 1	$ 5	$ 4

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+ References

No definition available.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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