Consolidated Statements of Changes in Common Stockholders' Investment - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Beginning Balance	$ 26,088	$ 24,939	$ 24,168
Net income	4,331	3,972	3,826
Other comprehensive loss, net of tax	(32)	(224)	(371)
Purchase of treasury stock	(2,517)	(1,500)	(2,248)
Cash dividends declared	(941)	(1,495)	(793)
Employee incentive plans and other	653	396	357
Ending Balance	27,582	26,088	24,939
Common Stock
Beginning Balance	32	32	32
Ending Balance	32	32	32
Additional Paid-In Capital
Beginning Balance	3,769	3,712	3,481
Purchase of treasury stock	(22)	(82)	(9)
Employee incentive plans and other	241	139	240
Ending Balance	3,988	3,769	3,712
Retained Earnings
Beginning Balance	35,259	32,782	29,817
Net income	4,331	3,972	3,826
Cash dividends declared	(941)	(1,495)	(793)
Employee incentive plans and other			(68)
Ending Balance	38,649	35,259	32,782
Accumulated Other Comprehensive Loss
Beginning Balance	(1,327)	(1,103)	(732)
Other comprehensive loss, net of tax	(32)	(224)	(371)
Ending Balance	(1,359)	(1,327)	(1,103)
Treasury Stock
Beginning Balance	(11,645)	(10,484)	(8,430)
Purchase of treasury stock	(2,495)	(1,418)	(2,239)
Employee incentive plans and other	412	257	185
Ending Balance	$ (13,728)	$ (11,645)	$ (10,484)