Goodwill and Acquired Intangible Assets - Schedule of Changes in Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Goodwill [Line Items]
Balance, beginning of period	$ 3,358,511	$ 2,353,654
Foreign currency translation adjustments	26,262	30,007
Balance, end of period	3,461,891	3,358,511
Pure Systems Acquisition
Goodwill [Line Items]
Goodwill, acquired	$ 77,118
Servicemax acquisition
Goodwill [Line Items]
Goodwill, acquired		$ 974,850