Computation of Earnings Per Share - Schedule of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
		May 31, 2023	May 31, 2022	May 31, 2021
Basic earnings per common share:
Net earnings allocable to common shares	[1]	$ 3,966	$ 3,819	$ 5,220
Weighted-average common shares		254.0	263.0	264.0
Basic earnings per common share		$ 15.60	$ 14.54	$ 19.79
Diluted earnings per common share:
Net earnings allocable to common shares	[1]	$ 3,966	$ 3,819	$ 5,221
Weighted-average common shares		254.0	263.0	264.0
Dilutive effect of share-based awards		2.0	3.0	4.0
Weighted-average diluted shares		256.0	266.0	268.0
Diluted earnings per common share		$ 15.48	$ 14.33	$ 19.45
Anti-dilutive options excluded from diluted earnings per common share		7.4	4.0	3.5

[1] Net earnings available to participating securities were immaterial in all periods presented.