REVENUE RECOGNITION - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Increase in contract liabilities		$ 190
Revenue recognized, included in beginning contract liability	$ 154	522
Backlog	8,800	8,800
AspenTech
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog	1,250	1,250
National Instruments
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog	$ 500	$ 500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of backlog recognized as revenue, next 12 months	75.00%	75.00%
Expected timing of satisfaction, backlog	12 months	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, backlog	1 year	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, backlog	1 year	1 year