Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) ("AOCI") (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			$ 26,088
Translation adjustments	$ (39)	$ 80	(39)	$ (199)
Ending Balance	26,375	24,733	26,375	24,733
Foreign Currency Translation Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,362)	(1,427)	(1,362)	(1,148)
Translation adjustments	(39)	80	(39)	(199)
Ending Balance	(1,401)	(1,347)	(1,401)	(1,347)
Retirement Plans Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	68	42	35	45
Prior service credit arising during period			36
Reclassifications from AOCI	(2)	(3)	(5)	(6)
Ending Balance	66	39	66	39
Accumulated Other Comprehensive (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,294)	(1,385)	(1,327)	(1,103)
Ending Balance	$ (1,335)	$ (1,308)	$ (1,335)	$ (1,308)