CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]				ASC 606
Cash dividends on common stock (in dollars per share)	$ 1.35	$ 1.31	$ 1.145