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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, 2022 | May 31, 2021 | May 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Taxes computed at federal statutory rate | $ 1,028 | $ 1,401 | $ 350
U.S. and foreign return-to-provision adjustments | (142) |  |
State and local income taxes, net of federal benefit | 116 | 179 | 53
Foreign operations | 115 | 138 | 38
Non-deductible expenses | 48 | 53 | 70
Uncertain tax positions | (18) | 65 | (14)
Benefits from share-based payments | (13) | (69) | (5)
Valuation allowance | 33 | 14 | (129)
Foreign tax rate enactments | (30) | (61) | (10)
Benefit from U.S. tax loss carryback to prior years | 0 | (279) | (71)
Goodwill impairment charges |  |  | 75
U.S. deferred tax adjustments related to foreign operations |  |  | 51
Other, net | (67) | 2 | (25)
Provision for Income Taxes, Total | $ 1,070 | $ 1,443 | $ 383
Effective Tax Rate | 21.90% | 21.60% | 23.00%

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