REVENUE FROM CONTRACTS WITH CUSTOMERS - Remaining Performance Obligations (Details) $ in Billions	6 Months Ended
	Mar. 31, 2023 USD ($)
Revenue from Contract with Customer [Abstract]
Amount of remaining performance obligation	$ 1.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Period of unsatisfied performance obligations represented in backlog contracts with month-to-month terms	1 month
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue from Contract with Customer [Abstract]
Amount of remaining performance obligation	$ 0.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction for remaining performance obligation	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue from Contract with Customer [Abstract]
Amount of remaining performance obligation	$ 0.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction for remaining performance obligation	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue from Contract with Customer [Abstract]
Amount of remaining performance obligation	$ 0.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction for remaining performance obligation	12 months