Pension Plans (Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets) (Details) - Pension Plan - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
United States
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 22.1	$ 254.6
Accumulated benefit obligation	22.1	254.6
Estimated fair value of plan assets	0.0	222.1
International
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	16.3	49.4
Accumulated benefit obligation	15.3	48.3
Estimated fair value of plan assets	$ 0.0	$ 34.3

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- 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/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-3

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- Definition

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

+ References

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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
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-3

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