Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Lessee, Lease, Description [Line Items]
Operating lease payments	$ 18.9	$ 18.0	$ 37.4	$ 35.6
Operating lease liability non cash			$ 34.5	$ 28.1
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