Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	$ (14)	$ (139)	$ 78
Income before income taxes	6,661	2,887	4,801
Tax benefit (expense)	(934)	(348)	(772)
Revenues	44,538	37,403	39,117
Cost of sales	(24,576)	(21,162)	(21,643)
Demand creation expense	(3,114)	(3,592)	(3,753)
Interest expense (income), net	(262)	(89)	$ (49)
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss), net of tax	27	517
Gains (losses) on foreign currency translation adjustment | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	3	(1)
Income before income taxes	3	(1)
Tax benefit (expense)	0	0
Gain (loss), net of tax	3	(1)
Gain (losses) on cash flow hedges | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	45	519
Tax benefit (expense)	(8)	(2)
Gain (loss), net of tax	37	517
Gain (losses) on cash flow hedges | Foreign exchange forwards and options | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	(47)	181
Revenues	45	(17)
Cost of sales	51	364
Demand creation expense	3	(2)
Gain (losses) on cash flow hedges | Interest rate swaps | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense (income), net	(7)	(7)
OTHER | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	(13)	1
Income before income taxes	(13)	1
Tax benefit (expense)	0	0
Gain (loss), net of tax	$ (13)	$ 1