Income Taxes (Schedule of Source of Pre-Tax Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Earnings (loss) from continuing operations before income taxes, domestic	$ 1.5	$ (11.5)	$ (27.4)
Earnings (loss) from continuing operations before income taxes, foreign	121.5	157.5	114.7
Earnings (loss) before income taxes	$ 123.0	$ 146.0	$ 87.3