Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			$ 27,582
Translation adjustments	$ (181)	$ 28	(152)
Ending Balance	26,460	26,766	26,460	$ 26,766
Foreign Currency Translation Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,393)	(1,390)	(1,422)	(1,362)
Translation adjustments	(181)	28	(152)	0
Ending Balance	(1,574)	(1,362)	(1,574)	(1,362)
Retirement Plans Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	61	34	63	35
Prior service credit arising during period	0	36	0	36
Reclassifications from AOCL	(2)	(2)	(4)	(3)
Ending Balance	59	68	59	68
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,332)	(1,356)	(1,359)	(1,327)
Ending Balance	$ (1,515)	$ (1,294)	$ (1,515)	$ (1,294)