Interim Unaudited Consolidated Financial Statements - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	May 16, 2022
Contractors [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired		55.00%
Revenue from Contract with Customer, Including Assessed Tax Russia	$ 10.0
Assets Russia	$ 24.5
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interim Unaudited Consolidated Financial Statements	Organization and Basis of Presentation Aspen Technology, Inc., together with its subsidiaries (“AspenTech" or “Company”), is a leading industrial software company that develops solutions to address complex industrial environments where it is critical to optimize the asset design, operations and maintenance lifecycle. Through the Company's unique combination of product capabilities and deep domain expertise and award-winning innovation, customers across diverse end markets in capital-intensive industries can improve their operational excellence while achieving sustainability goals. On October 10, 2021, Emerson Electric Co. (“Emerson”) entered into a definitive agreement (the “Transaction Agreement”) with Aspen Technology Corporation. (“Heritage AspenTech”) to contribute the Emerson Industrial Software Business (the "Industrial Software Business"), along with $6.014 billion in cash, to create AspenTech (the “Transaction”). The Industrial Software Business included Open Systems International, Inc. (“OSI Inc.”) and Geological Simulation Software (“GSS”), which we have renamed as Subsurface Science & Engineering (“SSE”). The Transaction closed on May 16, 2022 (“Closing Date”). Emerson owns 55% of AspenTech on a fully diluted basis as of September 30, 2022. On July 27, 2022, the Company entered into a definitive agreement to acquire Mining Software Holdings Pty Ltd ("Micromine") for AU $900 million in cash (approximately $623.0 million based on exchange rates when the acquisition was initially announced). Micromine is a global leader in design and operational management solutions for the metals and mining industry. The Company currently intends to finance the transaction through a combination of cash on hand and additional debt financing. The acquisition is expected to close in the fiscal second quarter of 2023, subject to receipt of regulatory approvals. The Company operates globally in 80 countries as of September 30, 2022. Basis of Presentation The accompanying consolidated and combined financial statements include the accounts of Aspen Technology, Inc. and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The Transaction was accounted for as a business combination in accordance with U.S. GAAP, with the Industrial Software Business treated as the “acquirer” and Heritage AspenTech treated as the “acquired” company for financial reporting purposes. Accordingly, for the three-month interim period ended September 30, 2021, the consolidated and combined financial statements comprise the results of the Industrial Software Business only and do not include the results of Heritage AspenTech. We have prepared the accompanying consolidated and combined financial statements as of September 30, 2022, and for the first quarter of fiscal 2023 and 2022, without audit, pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (SEC) and in accordance with generally accepted accounting principles in the United States (GAAP). These consolidated and combined financial statements should be read in conjunction with the consolidated and combined financial statements and the notes thereto included in our Transition Reports on Form 10-KT for the fiscal year ended June 30, 2022. The preparation of financial statements and related disclosures in conformity with GAAP requires us to make judgments, assumptions, and estimates that affect the amounts reported in the consolidated and combined financial statements and accompanying notes. The actual results that we experience may differ materially from our estimates. Certain reclassifications have been made to the amounts in prior periods in order to conform to the current period’s presentation. We have evaluated subsequent events through the date that the financial statements were issued. Russia and Ukraine While the Company has no operations in Ukraine, the ongoing conflict there could negatively impact its financial position, results of operations and cash flows. The United States and other governments have imposed sanctions and taken other regulatory actions that adversely affect doing business in Russia and with Russian companies. The Company maintains operations in Russia, licenses software and provides related services to customers in Russia and areas of Ukraine that are not under sanction. The Company had net sales of approximately $10.0 million for the three-month period ended September 30, 2022, and total assets of approximately $24.5 million as of September 30, 2022, related to operations in Russia. While the conflict has not had a material impact on the Company's financial results thus far, the Company continues to evaluate the impact of the various sanctions, export control measures and business restrictions imposed by the United States and other governments on its ability to do business in Russia and areas of Ukraine that are not under sanction, maintain contracts with vendors and pay employees in Russia, as well as receive payment from customers in Russia and areas of Ukraine that are not under sanction. The outcome of these assessments will depend on how the conflict evolves and on further actions that may be taken by the United States, Russia, and other governments around the world. As a software company, no material impact to supply chain operations is expected due to the conflict in Ukraine. If the sanctions and other retaliatory measures and restrictions imposed by the global community change, the Company may be required to cease or suspend operations in the region or, should the conflict or the effects of these sanctions, measures and restrictions worsen, the Company may voluntarily elect to do so. Any disruption to, or suspension of, the Company’s business and operations in Russia would result in the loss of revenues from the business in Russia. In addition, as a result of the risk of collectability of receivables from customers in Russia, the Company may be required to adjust accounting practices relating to revenue recognition in this region, with the result that the Company may not be able to recognize revenue until risk of revenue reversal is not probable.