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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
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