Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022
Leases [Abstract]
Operating cash flows paid for operating leases	$ 3,207	$ 2,981
Operating cash flows paid for interest portion of finance leases	15	15
Financing cash flows paid for principal portion of finance leases	94	99
Right-of-use assets obtained in exchange for new operating lease liabilities	3,317	3,489
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 414	$ 56