CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]					Accounting Standards Update 2020-06 [Member]
Cash dividends on common stock (in USD per share)	$ 0.36	$ 0.345	$ 0.72	$ 0.69