CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]		Accounting Standards Update 2020-06 [Member]
Cash dividends on common stock (in dollars per share)	$ 1.47	$ 1.41	$ 1.35