Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Lessee, Lease, Description [Line Items]
Finance, term of lease (in years)	5 years		5 years
Operating lease payments	$ 19.5	$ 18.4	$ 56.9	$ 54.0
Operating lease liability non cash			55.2	$ 55.3
Finance lease liability non cash			$ 2.1
Minimum
Lessee, Lease, Description [Line Items]
Initial term of lease (in years)	3 years		3 years
Maximum
Lessee, Lease, Description [Line Items]
Initial term of lease (in years)	10 years		10 years