Revenue Recognition Contract Assets (Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Unbilled receivables (contract assets)	$ 1,323	$ 1,323	$ 528
Customer advances (contract liabilities)	(917)	(917)	(730)
Net contract liabilities	406	406	$ (202)
Revenue recognized, included in beginning contract liability	63	519
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog	8,500	8,500
AspenTech
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog	$ 700	$ 700