CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 68	$ 71
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	220,000
Common stock, shares authorized (in shares)	450,000,000	450,000,000
Common stock, shares issued (in shares)	216,124,332	210,906,052