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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
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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%

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