Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Income tax provision	$ 8.1	$ 13.5	$ 20.8	$ 25.7
Earnings before income taxes	$ 37.2	$ 62.5	$ 76.8	$ 115.5
Effective tax rate	21.70%	21.60%	27.00%	22.20%