SHAREHOLDERS' EQUITY, Common Stock Outstanding Roll Forward (Details) - shares	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period (in shares)	207,300,000	211,600,000	208,769,095	215,100,000
Repurchases of common stock under the Board of Directors’ common stock repurchase authorization (in shares)	(2,000,000.0)	(3,300,000)	(5,100,000)	(8,400,000)
Issuances due to vesting of RSUs, employee stock purchases, and exercise of stock options, net of forfeitures (in shares)	300,000	200,000	1,900,000	1,800,000
Balance end of period (in shares)	205,573,733	208,500,000	205,573,733	208,500,000