Restructuring and Other Charges (Credits), Net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Restructuring Cost And Reserve [Line Items]
Restructuring Charges			$ 32,400
Sublease Income	$ 1,436	$ 4,749	4,600
Payments for restructuring			40,800
Restructuring and other charges (credits), net	$ (802)	$ (460)	$ 36,234
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]			Restructuring and other charges (credits), net
Saas Transformation
Restructuring Cost And Reserve [Line Items]
Other charges for professional fees			$ 5,100
Impairment and Accretion Exited Lease Facilities
Restructuring Cost And Reserve [Line Items]
Sublease Income			1,300
Employee Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Payments for restructuring			34,000
Restructured Facilities
Restructuring Cost And Reserve [Line Items]
Payments for restructuring			4,300
Restructuring Plan 2022
Restructuring Cost And Reserve [Line Items]
Payments for other professional fees			$ 2,500