Pension and Retirement Plans - Assumptions used for projected benefit obligation (Details) - Pension:	Sep. 30, 2022	Sep. 30, 2021
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Discount rate:	5.14%	2.75%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate:	5.20%	2.00%
Expected return on plan assets:	6.00%	4.00%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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