Acquisition	9 Months Ended
Jun. 30, 2021
Business Combinations [Abstract]
Acquisition	C. Acquisition Shenzhen Sanshun Nano New Materials Co., Ltd On April 1, 2020, the Company purchased Shenzhen Sanshun Nano New Materials Co., Ltd (SUSN), a leading carbon nanotube producer, for an estimated purchase price of $100 million, consisting of: (i) cash consideration of $84 million, net of $1 million acquired, (ii) contingent consideration of up to $3 million to be paid over the two-year period ending March 31, 2022 upon the satisfaction of certain milestones, and (iii) assumed debt of $13 million. The debt the Company assumed in the transaction was repaid in June 2020. The operating results of SUSN are included in the results of the Company's Performance Chemicals segment beginning in the third quarter of fiscal 2020.

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-URI http://asc.fasb.org/topic&trid=2303972

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