SHARE-BASED AND OTHER COMPENSATION, Other Compensation (Details) - USD ($) shares in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Award requisite service period	5 years
Employer match percent of first $1,000 of compensation deferred by each participant	75.00%
Employer match of first $1,000 of compensation deferred by each participant	$ 1,000
Employer match percent of next $1,000 of compensation deferred by each participant	25.00%
Employer match of next $1,000 of compensation deferred by each participant	$ 1,000
Compensation expense	$ 230,000,000	$ 254,000,000	$ 223,000,000
Employee Stock Ownership Plan ESOP
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares of common stock held by ESOP (in shares)	6.3	6.5
Market value of common stock held by the ESOP	$ 1,090,000,000.00
Value of unearned (not yet vested) shares held by ESOP plan participants	$ 11,000,000