Condensed Consolidated Statements of Changes in Common Stockholders' Investment (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2022	Aug. 31, 2021
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per share	$ 2.30	$ 1.50
Other comprehensive income, tax benefit	$ 18	$ 0
Purchase of treasury stock	0.0	1,900,000
Employee incentive plans and other, shares issued	700,000	600,000