Computation of Earnings Per Share - Schedule of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Basic earnings per common share:
Net earnings allocable to common shares	[1]	$ 786	$ 1,042	$ 1,660	$ 2,152
Weighted-average common shares		255.0	265.0	257.0	265.0
Basic earnings per common share		$ 3.08	$ 3.94	$ 6.46	$ 8.11
Diluted earnings per common share:
Net earnings allocable to common shares	[1]	$ 786	$ 1,042	$ 1,660	$ 2,152
Weighted-average common shares		255.0	265.0	257.0	265.0
Dilutive effect of share-based awards		1.0	3.0	2.0	5.0
Weighted-average diluted shares		256.0	268.0	259.0	270.0
Diluted earnings per common share		$ 3.07	$ 3.88	$ 6.41	$ 7.97
Anti-dilutive options excluded from diluted earnings per common share		9.5	4.2	7.6	3.5

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