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Retirement Benefits (Schedule of Accumulated Benefit Obligations In Excess of and Less Than Fair Value of Plan Assets) (Details) - Defined Benefit Pension Plan [Member] - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Plans with accumulated benefit obligation in excess of plan assets
Projected benefit obligation, plans with ABO in excess of plan assets	$ (48,371)	$ (112,302)
Accumulated benefit obligation, plans with ABO in excess of plan assets	(48,354)	(111,151)
Fair value of plan assets, plans with ABO in excess of plan assets	18,459	57,945
Plans with accumulated benefit obligation less than plan assets
Projected benefit obligation, plans with ABO less than plan assets	(149,550)	(187,062)
Accumulated benefit obligation, plans with ABO less than plan assets	(148,571)	(186,245)
Fair value of plan assets, plans with ABO less than plan assets	$ 183,601	$ 233,161

X

- Definition

Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920

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-Publisher FASB
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- Definition

Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920

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- Definition

Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920

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- Definition

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations less than plan assets as of the measurement date of each statement of financial position presented.

+ References

No definition available.

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- Definition

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations less than plan assets as of the measurement date of each statement of financial position presented.

+ References

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