Leases - Supplemental Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities:	$ 589	$ 583	$ 532
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	$ 537	$ 489	$ 705