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Employee Benefit Plans - Schedule of Weighted Average Assumptions (Details)	Sep. 30, 2021	Sep. 30, 2020
Pension Plan
Weighted-average assumptions as of September 30
Discount rate	2.91%	2.71%
Expected return on plan assets	4.46%	4.89%
Postretirement Health and Other
Weighted-average assumptions as of September 30
Discount rate	2.61%	2.36%

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- Definition

Represents the expected rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefit obligation.

+ References

No definition available.

+ Details

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- Definition

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

+ References

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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- References

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