Discontinued Operations - Additional Information (Details) - Discontinued operations - Software Integrity business $ in Millions		3 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) quarter	Jan. 31, 2025 USD ($)	Oct. 31, 2024 USD ($)
Disposal Groups, Including Discontinued Operations [Line Items]
Sale consideration	$ 1,650.0
Cash consideration	1,480.0
Deferred consideration receivable, present value	121.5
Deferred consideration receivable	$ 125.0
Number of fiscal quarters for consideration installment payments | quarter	5
Contingent consideration receivable	$ 22.2
Contingent consideration receivable, achievement of specified rate of return	475.0
Additional consideration receivable as a result of net working capital adjustments	$ 27.1
Derecognized net assets			$ 720.5
Transaction costs incurred			61.7
Pre-tax gain on discontinued operation			$ 868.8
Deferred consideration received		$ 25.0