Acquisitions - Narrative (Details) - USD ($) $ in Thousands				1 Months Ended	3 Months Ended
	Aug. 29, 2022	May 16, 2022	Oct. 10, 2021	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Business Acquisition [Line Items]
Goodwill				$ 8,326,336	$ 8,326,336		$ 8,266,809
Effective income tax rate (as a percent)					89.30%	27.80%
Trademarks				436,794	$ 436,794		316,543
Total revenue					250,819	$ 77,015
Net (loss)					(11,244)	(11,202)
Payments to Acquire Businesses, Net of Cash Acquired					74,947	1,065
Business Acquisition, Percentage of Voting Interests Acquired		55.00%
Business Acquisition, Pro Forma Revenue					250,819	213,035
Business Acquisition, Pro Forma Net Income (Loss)					(6,233)	(45,604)
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments				1,900	1,900
Intangible asset amortization expense					121,200	$ 28,800
Business Combination, Consideration Transferred, Net Cash Paid	$ 74,900
Heritage AspenTech
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		$ 11,190,000
Inmation Software GmbH
Business Acquisition [Line Items]
Consideration transferred	87,400
Identifiable intangible assets	31,500
Goodwill	63,600
Total revenue				300
Net (loss)				(200)
Business Combination, Consideration Transferred, Cash Paid	78,900
Business Combination, Consideration Transferred, Hold Back	8,500
Business Combination, Consideration Transferred, Exchange of Shares	17,600
Business Combination, Consideration Transferred, Exchange of Shares, After	2,000
Business Combination, Consideration Transferred, Cash Acquired	$ 4,000
Heritage AspenTech
Business Acquisition [Line Items]
Consideration transferred			$ 6,014,000
Identifiable intangible assets				4,390,667	4,390,667
Goodwill				7,224,730	7,224,730
Business Acquisition, Percentage of Voting Interests Acquired		45.00%
Intangible asset amortization expense					97,900
Emerson Electric Co.
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		55.00%
Customer relationships
Business Acquisition [Line Items]
Trademarks				216,733	216,733		144,888
Customer relationships | Inmation Software GmbH
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	7 years
Gross carrying amount
Business Acquisition [Line Items]
Trademarks				201,017	201,017		$ 153,758
Gross carrying amount | Inmation Software GmbH
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	5 years
Trademarks				$ 500	$ 500