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Discontinued Operations, Goodwill and Intangible Assets - Schedule of Significant Components Included in Statement of Cash Flows for Discontinued Operations (Details) - Held for Sale - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Discontinued Operations, Goodwill and Intangible Assets [Line Items]
Payments for capital expenditures	$ 0.0	$ (0.3)	$ 0.0	$ (2.4)
Noncash increase in noncurrent assets held for sale due to deconsolidation of a joint venture	0.0	0.0	41.6	0.0
Noncash decrease in noncontrolling interest due to deconsolidation of a joint venture	$ 0.0	$ 0.0	$ (13.8)	$ 0.0

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- Definition

Disposal Groups, Including Discontinued Operations, Noncash Decrease In Noncontrolling Interest

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- Definition

Amount of capital expenditure attributable to discontinued operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5B
-Subparagraph (c)(2)
-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3A
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-Paragraph 3A
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