Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenues	$ 1,080.4	$ 1,123.1	$ 1,120.8
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Product [Member]	Product [Member]	Product [Member]
Cost of products sold	$ 403.6	$ 387.9	$ 370.9
Cost, Product and Service [Extensible Enumeration]	Product [Member]	Product [Member]	Product [Member]
Gross Profit	$ 676.8	$ 735.2	$ 749.9
Operating expenses:
Selling and administrative expense	332.0	365.1	341.3
Research and development expense	37.3	78.8	85.2
Impairment expense	0.0	0.0	2.5
Other operating expenses	65.4	124.5	99.4
Total Operating Expenses	434.7	568.4	528.4
Operating Income	242.1	166.8	221.5
Interest expense, net	(107.3)	(112.3)	(107.0)
Other income (expense), net	1.5	(10.3)	(8.8)
Income Before Income Taxes	136.3	44.2	105.7
Income tax provision (benefit)	40.9	(34.1)	35.3
Net Income	$ 95.4	$ 78.3	$ 70.4
Net Income per common share:
Basic (in dollars per share)	$ 1.64	$ 1.36	$ 1.23
Diluted (in dollars per share)	$ 1.62	$ 1.34	$ 1.22