Earnings Per Share - Reconciliation from Basic Earnings Per Share to Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 6,046	$ 5,727	$ 2,539
Determination of shares:
Weighted average common shares outstanding	1,578.8	1,573.0	1,558.8
Assumed conversion of dilutive stock options and awards	32.0	36.4	32.8
DILUTED WEIGHTED AVERAGE COMMON SHARES OUTSTANDING	1,610.8	1,609.4	1,591.6
Earnings per common share:
Basic (in dollars per share)	$ 3.83	$ 3.64	$ 1.63
Diluted (in dollars per share)	$ 3.75	$ 3.56	$ 1.60