Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended				9 Months Ended
	Feb. 29, 2024	Aug. 31, 2023	Feb. 28, 2023	Aug. 31, 2022	Feb. 29, 2024	Feb. 28, 2023
Preferred Stock, Dividends Per Share, Declared (in dollars per share)	$ 2.93	$ 2.92	$ 2.65	$ 2.19	$ 2.93	$ 2.39