Consolidated Statements of Changes in Common Stockholders' Investment (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per share	$ 5.86	$ 3.00	$ 2.60
Other comprehensive gain (loss), tax	$ (27)	$ (19)	$ 10
Purchase of treasury stock	9,200,000	8,900,000
Employee incentive plans and other, shares issued	1,900,000	1,400,000	5,400,000