UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.340	$ 0.305	$ 0.645	$ 0.580
Dividends declared per preferred share (in dollars per share)			$ 0.10	$ 0.10