Lease Commitments - Schedule of Other Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating cash flows from operating leases	$ 38.7	$ 34.9
Operating cash flows from finance leases	10.2	9.3
Financing cash flows from finance leases	10.8	8.8
Leased assets obtained in exchange for operating lease obligations	46.4	46.8
Leased assets obtained in exchange for finance lease obligations	$ 21.3	$ 18.6