Income Taxes (Schedule of Source of Pre-Tax Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Earnings (loss) from continuing operations before income taxes, domestic	$ (105.7)	$ (13.3)	$ 37.6
Earnings (loss) from continuing operations before income taxes, foreign	129.3	134.2	110.1
Earnings (loss) before income taxes	$ 23.6	$ 120.9	$ 147.7