Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 26,088	$ 24,939	$ 24,168
Translation adjustments	(60)	(214)	(363)
Ending Balance	27,582	26,088	24,939
Foreign Currency Translation Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,362)	(1,148)	(785)
Translation adjustments	(60)	(214)	(363)
Ending Balance	(1,422)	(1,362)	(1,148)
Retirement Plans Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	35	45	53
Prior service credit arising during period	36
Amortization of prior service credits	(8)	(10)	(8)
Ending Balance	63	35	45
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,327)	(1,103)	(732)
Ending Balance	$ (1,359)	$ (1,327)	$ (1,103)