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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		9 Months Ended
		Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Basic earnings per common share:
Net earnings allocable to common shares	[1]	$ 908	$ 878	$ 2,441	$ 2,853
Weighted-average common shares		240.0	247.0	242.0	249.0
Basic earnings per common share		$ 3.79	$ 3.55	$ 10.09	$ 11.43
Diluted earnings per common share:
Net earnings allocable to common shares	[1]	$ 908	$ 878	$ 2,441	$ 2,853
Weighted-average common shares		240.0	247.0	242.0	249.0
Dilutive effect of share-based awards		2.0	3.0	2.0	3.0
Weighted-average diluted shares		242.0	250.0	244.0	252.0
Diluted earnings per common share		$ 3.76	$ 3.51	$ 9.99	$ 11.31
Anti-dilutive options excluded from diluted earnings per common share		4.1	6.3	4.1	6.3
[1] Net earnings available to participating securities were $1 million and $1 million for the three-month periods ended February 28, 2025 and February 29, 2024, respectively, and $3 million and $4 million for the nine-month periods ended February 28, 2025 and February 29, 2024, respectively.

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