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Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | May 31, 2023 | May 31, 2022
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Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, equipment, leases and intangibles | $ 4,608 | $ 4,464
Employee benefits | 876 | 1,203
Self-insurance accruals | 1,085 | 931
Other | 454 | 524
Net operating loss/credit carryforwards | 1,149 | 1,079
Valuation allowances | (471) | (413)
Deferred Tax Assets, Net | 7,701 | 7,788
Property, equipment, leases and intangibles | 10,965 | 10,608
Other | 62 | 66
Deferred Tax Liabilities | $ 11,027 | $ 10,674

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