REVENUE RECOGNITION - Narrative (Details) $ in Millions	12 Months Ended
	Sep. 30, 2025 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue recognized, included in beginning contract liability	$ 798
Backlog	$ 8,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
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]: 2026-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of backlog recognized as revenue, next 12 months	25.00%
Expected timing of satisfaction, backlog	2 years