Discontinued Operations - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 01, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of operations, net of cash disposed		$ 71.5	$ 0.0	$ 0.0
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal of discontinued operations		$ 0.0	$ 1,571.6	$ 0.0
Discontinued Operations, Held-for-sale | Global Products
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of operations, net of cash disposed	$ 2,650.0