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, 2024	May 31, 2023	May 31, 2022
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Taxes computed at federal statutory rate	$ 1,226	$ 1,126	$ 1,028
U.S. and foreign return-to-provision adjustments	11	(44)	(142)
State and local income taxes, net of federal benefit	177	152	116
Foreign operations	65	96	115
Non-deductible expenses	48	40	48
Uncertain tax positions	(21)	60	(18)
Benefits from share-based payments	(26)	(18)	(13)
Valuation allowance	59	59	33
Foreign tax rate enactments		3	(30)
State deferred tax remeasurement	54
Goodwill impairment charges		8
Other, net	(88)	(91)	(67)
Provision for Income Taxes, Total	$ 1,505	$ 1,391	$ 1,070
Effective Tax Rate	25.80%	25.90%	21.90%