Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023
Leases [Abstract]
Operating cash flows paid for operating leases	$ 3,319	$ 3,207
Operating cash flows paid for interest portion of finance leases	15	15
Financing cash flows paid for principal portion of finance leases	80	94
Right-of-use assets obtained in exchange for new operating lease liabilities	2,083	3,317
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 10	$ 414