Income Taxes - Schedule of Reconciliation of Total Income Tax Expense and Amount Computed by Statutory Federal Income Tax Rate to Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Taxes computed at federal statutory rate	$ 1,126	$ 1,028	$ 1,401
U.S. and foreign return-to-provision adjustments	(44)	(142)
State and local income taxes, net of federal benefit	152	116	179
Foreign operations	96	115	138
Non-deductible expenses	40	48	53
Uncertain tax positions	60	(18)	65
Benefits from share-based payments	(18)	(13)	(69)
Valuation allowance	59	33	14
Foreign tax rate enactments	3	(30)	(61)
Benefit from U.S. tax loss carryback to prior years	0	0	(279)
Goodwill impairment charges	8
Other, net	(91)	(67)	2
Provision for Income Taxes, Total	$ 1,391	$ 1,070	$ 1,443
Effective Tax Rate	25.90%	21.90%	21.60%