Leases - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2022	Jun. 30, 2022	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Termination of capital lease obligation	$ 9.8	$ 9.8
Capital lease obligations, lease termination fee	$ 4.0	$ 4.0		$ 4.0
Gain on finance lease termination			$ 0.0	$ 0.0	$ 4.5