SHARE-BASED AND OTHER COMPENSATION, Restricted Stock Units and Restricted Stock Awards, Narrative (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 2,000,000
Weighted-average period of recognition	1 year
Share-based compensation amortization	$ 3,000,000	$ 6,000,000	$ 9,000,000
Employees and Directors | Restricted Stock Units | 2012 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Bonus amount that must be exceeded in order to receive awards in lieu of cash (in excess of)	$ 275,000
Award vesting period	1 year
Compensation cost not yet recognized	$ 338,000,000
Weighted-average period of recognition	3 years
Share-based compensation amortization	$ 245,000,000	$ 242,000,000	$ 220,000,000
Employees and Directors | Restricted Stock Units | 2012 Stock Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period of awards	3 years
Employees and Directors | Restricted Stock Units | 2012 Stock Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period of awards	5 years