Condensed Consolidated Statements of Changes in Common Stockholders' Investment - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2024	Aug. 31, 2023
Beginning Balance	$ 27,582
Net income	794	$ 1,078
Other comprehensive income/(loss,), net of tax (expense)/benefit	27	(29)
Ending Balance	27,176	26,534
Common Stock
Beginning Balance	32	32
Ending Balance	32	32
Additional Paid-In Capital
Beginning Balance	3,988	3,769
Purchase of treasury stock	(9)	(36)
Employee incentive plans and other	155	67
Ending Balance	4,134	3,800
Retained Earnings
Beginning Balance	38,649	35,259
Net income	794	1,078
Cash dividends declared	(676)	(316)
Ending Balance	38,767	36,021
Accumulated Other Comprehensive Loss
Beginning Balance	(1,359)	(1,327)
Other comprehensive income/(loss,), net of tax (expense)/benefit	27	(29)
Ending Balance	(1,332)	(1,356)
Treasury Stock
Beginning Balance	(13,728)	(11,645)
Purchase of treasury stock	(994)	(464)
Employee incentive plans and other	297	146
Ending Balance	$ (14,425)	$ (11,963)