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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Sales	$ 604	$ 509	$ 1,115	$ 977
Life Sciences [Member]
Disaggregation Of Revenue [Line Items]
Sales	204	185	374	355
Life Sciences [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	62	60	115	111
Life Sciences [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	66	60	121	114
Life Sciences [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	52	47	98	94
Life Sciences [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	24	18	40	36
Personal Care [Member]
Disaggregation Of Revenue [Line Items]
Sales	172	137	318	262
Personal Care [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	55	42	96	83
Personal Care [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	69	57	125	103
Personal Care [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	30	22	62	43
Personal Care [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	18	16	35	33
Specialty Additives [Member]
Disaggregation Of Revenue [Line Items]
Sales	182	158	338	305
Specialty Additives [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	61	48	114	93
Specialty Additives [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	69	62	125	114
Specialty Additives [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	45	39	85	80
Specialty Additives [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	7	9	14	18
Intermediates [Member]
Disaggregation Of Revenue [Line Items]
Sales	66	37	119	69
Intermediates [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Sales	43	20	74	40
Intermediates [Member] | Europe [Member]
Disaggregation Of Revenue [Line Items]
Sales	10	8	19	12
Intermediates [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Sales	11	7	21	14
Intermediates [Member] | Latin America & Other [Member]
Disaggregation Of Revenue [Line Items]
Sales	$ 2	$ 2	$ 5	$ 3

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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
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