Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income tax provision	$ 17.7	$ 5.8	$ 29.2	$ 14.7
Earnings before income taxes	$ 70.2	$ 36.3	$ 112.6	$ 79.6
Effective tax rate	25.30%	16.10%	25.90%	18.50%