Divestitures - Narrative (Details) - USD ($)			12 Months Ended
	Mar. 31, 2025	Dec. 15, 2022	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture of discontinued operations (net of income tax expense)			$ 0	$ 0	$ 443,100,000
Gain (Loss) on Disposition of Business			(57,200,000)	0	$ 0
Equity method investments			69,200,000	$ 9,400,000
Milacron Holdings
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operations, Including Disposal Group, Assets Contributed	$ 222,600,000
Consideration	286,000,000.0
Proceeds from divestiture of businesses	$ 98,000,000.0
Gain (Loss) on Disposition of Business			(57,200,000)
Discontinued Operation, Transaction Costs			8,900,000
Disposal Group, Including Discontinued Operation, Percentage of Business Sold	51.26%
Equity method investments			68,700,000
Equity Method Investment, Ownership Percentage	48.74%
Milacron Holdings | Term loans | Bain Capital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncash or Part Noncash Acquisition, Debt Assumed	$ 188,000,000.0
Milacron Holdings | $700 revolving credit facility (excluding outstanding letters of credit) | Bain Capital | Revolving Credit Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncash or Part Noncash Acquisition, Debt Assumed	$ 30,000,000.0
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation			142,900,000
Discontinued Operations | Batesville
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration		$ 761.5
Noncash or Part Noncash Divestiture, Amount of Consideration Received		$ 11.5
Discontinued Operations, Held-for-Sale | Batesville
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture of discontinued operations (net of income tax expense)			$ 586.0