Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021
Leases [Abstract]
Operating cash flows paid for operating leases	$ 2,981	$ 2,750
Operating cash flows paid for interest portion of finance leases	15	16
Financing cash flows paid for principal portion of finance leases	99	75
Right-of-use assets obtained in exchange for new operating lease liabilities	3,489	3,703
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 56	$ 126