Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) ("AOCI") (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			$ 24,939
Translation adjustments	$ (70)	$ (94)	(279)	$ (241)
Ending Balance	24,115	24,940	24,115	24,940
Foreign Currency Translation Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,357)	(932)	(1,148)	(785)
Translation adjustments	(70)	(94)	(279)	(241)
Ending Balance	(1,427)	(1,026)	(1,427)	(1,026)
Retirement Plans Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	43	51	45	53
Reclassifications from AOCI	(1)	(2)	(3)	(4)
Ending Balance	42	49	42	49
Accumulated Other Comprehensive (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,314)	(881)	(1,103)	(732)
Ending Balance	$ (1,385)	$ (977)	$ (1,385)	$ (977)