REVENUE RECOGNITION - Narrative (Details) $ in Millions	3 Months Ended
	Dec. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue recognized, included in beginning contract liability	$ 422
Backlog	8,500
AspenTech
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog	$ 1,250
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of backlog recognized as revenue, next 12 months	75.00%
Expected timing of satisfaction, backlog	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, backlog	2 years