Acquisitions and Disposition of Businesses - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jan. 03, 2023	Sep. 30, 2022	Apr. 29, 2022	Sep. 30, 2021	Jan. 15, 2021
Business Acquisition [Line Items]
Goodwill	$ 3,358,511		$ 2,353,654		$ 2,191,887
Servicemax Inc. acquisition
Business Acquisition [Line Items]
Goodwill		$ 974,850
Accounts receivable		58,722
Other net assets		5,540
Net tax liability		(121,656)
Deferred revenue		(97,829)
Total		1,448,227
Intland Software
Business Acquisition [Line Items]
Goodwill				$ 240,971
Accounts receivable				6,506
Net tax liability				(20,811)
Deferred revenue				(6,925)
Other net liabilities				(818)
Total				278,123
Arena Solutions
Business Acquisition [Line Items]
Goodwill						$ 562,838
Accounts receivable						11,392
Net tax liability						(41,256)
Deferred revenue						(15,500)
Other net liabilities						(369)
Total						714,605
Customer Relationships | Servicemax Inc. acquisition
Business Acquisition [Line Items]
Intangible assets		512,700
Customer Relationships | Intland Software
Business Acquisition [Line Items]
Intangible assets				38,800
Customer Relationships | Arena Solutions
Business Acquisition [Line Items]
Intangible assets						155,000
Purchased Software | Servicemax Inc. acquisition
Business Acquisition [Line Items]
Intangible assets		106,900
Purchased Software | Intland Software
Business Acquisition [Line Items]
Intangible assets				19,100
Purchased Software | Arena Solutions
Business Acquisition [Line Items]
Intangible assets						38,300
Trademarks | Servicemax Inc. acquisition
Business Acquisition [Line Items]
Intangible assets		$ 9,000
Trademarks | Intland Software
Business Acquisition [Line Items]
Intangible assets				$ 1,300
Trademarks | Arena Solutions
Business Acquisition [Line Items]
Intangible assets						$ 4,200