UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.370	$ 0.340	$ 0.710	$ 0.645
Dividends declared per preferred share (in dollars per share)			$ 0.10	$ 0.10
Issuance of shares to employees, net of shares withheld for employee taxes	$ 74	$ 66	$ 35	$ 44