Condensed Consolidated Statements of Changes in Common Stockholders' Investment (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per share	$ 1.15	$ 0.75	$ 3.45	$ 2.25
Other comprehensive income, tax benefit	$ 10	$ 5	$ 28	$ 5
Purchase of treasury stock	7,900,000	900,000	7,900,000	2,800,000
Employee incentive plans and other, shares issued	100,000	200,000	800,000	800,000