Lease Commitments - Schedule of Other Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating cash flows from operating leases	$ 43.1	$ 38.7
Operating cash flows from finance leases	11.1	10.2
Financing cash flows from finance leases	12.0	10.8
Leased assets obtained in exchange for operating lease obligations	63.4	46.4
Leased assets obtained in exchange for finance lease obligations	$ 22.4	$ 21.3