Leases - Summary of Components of Net Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022
Leases [Abstract]
Operating lease cost	$ 3,300	$ 3,100
Finance lease cost:
Amortization of right-of-use assets	36	26
Interest on lease liabilities	18	16
Total finance lease cost	54	42
Short-term lease cost	531	556
Variable lease cost	1,435	1,368
Net lease cost	$ 5,320	$ 5,066