Condensed Consolidated Statements of Changes in Common Stockholders' Investment - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2022	Aug. 31, 2021
Beginning Balance	$ 24,939
Net income	875	$ 1,112
Other comprehensive income, net of tax benefit of $18 and $0	(211)	(149)
Ending Balance	25,140	24,321
Common Stock
Beginning Balance	32	32
Ending Balance	32	32
Additional Paid-In Capital
Beginning Balance	3,712	3,481
Employee incentive plans and other	39	129
Ending Balance	3,751	3,610
Retained Earnings
Beginning Balance	32,782	29,817
Net income	875	1,112
Cash dividends declared ($2.30 and $1.50 per share)	(597)	(400)
Employee incentive plans and other		(67)
Ending Balance	33,060	30,462
Accumulated Other Comprehensive Loss
Beginning Balance	(1,103)	(732)
Other comprehensive income, net of tax benefit of $18 and $0	(211)	(149)
Ending Balance	(1,314)	(881)
Treasury Stock
Beginning Balance	(10,484)	(8,430)
Purchase of treasury stock (0.0 and 1.9 million shares)		(549)
Employee incentive plans and other	95	77
Ending Balance	$ (10,389)	$ (8,902)