Consolidated Statements of Shareholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Common stock, dividends per share declared (in dollars per share)	$ 3.14	$ 3.02	$ 2.88
Preferred stock dividends per share declared (in dollars per share)	$ 1.475	$ 1.475	$ 1.475