Common Shares and Share-Based Compensation (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic	592.8	598.2	593.6	598.7
Dilutive shares	3.4	3.9	3.3	3.6
Diluted shares outstanding	596.2	602.1	596.9	602.3
AspenTech
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock compensation	$ 15		$ 15