Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 24,939	$ 24,168	$ 18,295
Translation adjustments	(214)	(363)	422
Ending Balance	26,088	24,939	24,168
Foreign Currency Translation Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,148)	(785)	(1,207)
Translation adjustments	(214)	(363)	422
Ending Balance	(1,362)	(1,148)	(785)
Retirement Plans Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	45	53	60
Reclassifications from AOCI	(10)	(8)	(7)
Ending Balance	35	45	53
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,103)	(732)	(1,147)
Ending Balance	$ (1,327)	$ (1,103)	$ (732)